Exploring the Meaning of Kakologeo in Greek

κακολογέω expresses the act of cursing or reviling, speech that turns against a person, a name, or a movement. It appears in contexts ranging from family obligations to public dispute, highlighting the social and moral weight of hostile words.

Root and Related Words

κακολογέω is built from kakos (κακός), “evil/harm,” and logos (λόγος), “word.” The combined idea is speech shaped by harm—words deployed in a way that damages, disgraces, or attacks their target.

Occurrences

Matthew 15:4: For God commanded, ‘Honor your father and your mother,’ and, ‘He who speaks evil of father or mother, let him be put to death.’

Here κακολογέω stands opposite the commanded honoring of parents. The verse sets “Honor your father and your mother” alongside a severe penalty for the one who “speaks evil of father or mother.” The word therefore frames reviling as more than casual disrespect: it is a direct verbal assault on the parental relationship, treated as a serious breach of order and obligation within the household. The juxtaposition highlights that honor is not only shown by actions but also guarded by speech; what is spoken “of” father or mother is presented as morally consequential and publicly accountable.

Mark 7:10: For Moses said, ‘Honor your father and your mother;’ and, ‘He who speaks evil of father or mother, let him be put to death.’

This occurrence repeats the same pairing of honor and verbal harm, reinforcing that κακολογέω can name a form of speech regarded as sharply destructive within family life. The construction “speaks evil of father or mother” keeps the focus on the directed object of the reviling: the parent as parent. In this setting, κακολογέω is not simply negative talk in general; it is speech aimed at those who bear a unique relational claim, making the reviling a targeted violation rather than a vague lapse in manners.

Mark 9:39: But Jesus said, “Don’t forbid him, for there is no one who will do a mighty work in my name, and be able quickly to speak evil of me.

In this scene, κακολογέω is tied to the name of Jesus and to public alignment with that name. The saying assumes that doing “a mighty work in my name” and then “quickly” reviling Jesus are incompatible. The word marks a kind of speech that would repudiate or malign its target; it is portrayed as the opposite of honoring the name under which the work is done. The adverb “quickly” gives the act of reviling a temporal edge: it would be a rapid turn from action associated with Jesus’ name to hostile speech against him. By placing κακολογέω in this logic, the verse treats reviling as a decisive verbal shift—an outward sign of changed allegiance.

Acts 19:9: But when some were hardened and disobedient, speaking evil of the Way before the multitude, he departed from them, and separated the disciples, reasoning daily in the school of Tyrannus.

In Acts, κακολογέω describes public opposition: certain people are “hardened and disobedient,” and their resistance is expressed as “speaking evil of the Way before the multitude.” The target is not a single individual but “the Way,” and the location is communal—“before the multitude.” The word therefore functions as a label for open, crowd-facing reviling that seeks to discredit what others might hear and consider. The narrative consequence is separation: “he departed from them, and separated the disciples,” moving the teaching setting to “the school of Tyrannus.” In this setting, κακολογέω is presented as speech that disrupts the public space and forces a change in where and how instruction is carried on.

Sense and Usage

Across these four passages, κακολογέω consistently depicts cursing or reviling as a deliberate, directed use of words against a particular object. Two occurrences place it in the most intimate social structure—relations between children and parents—where reviling is set over against the obligation to honor. There, it denotes speech that violates a recognized bond and brings severe judgment into view. The repetition in Matthew and Mark underlines that the harm is not incidental: the speech is treated as an identifiable act with defined moral weight.

Mark 9:39 shifts the focus from family roles to personal allegiance. The word still conveys verbal hostility, but now the issue is the coherence between deeds done “in my name” and words spoken “of me.” Reviling functions as a kind of repudiation, something not easily paired with an action that publicly associates itself with Jesus’ name. The verse does not analyze motives; it uses the possibility of κακολογέω as a boundary marker for who is to be opposed and who is not.

Acts 19:9 broadens the scope again: reviling targets “the Way” and operates “before the multitude.” This shows how κακολογέω can work at the level of public reputation, not only personal insult. The word marks speech that has a social audience and therefore a wider effect: it is not merely one person’s private contempt but a voiced campaign of disparagement in a public setting. The narrative portrays such reviling as corrosive to communal hearing and instruction, prompting withdrawal and the establishment of an alternate venue for daily reasoning.

Taken together, the occurrences show that κακολογέω can be aimed at family members, at Jesus himself, or at “the Way,” yet in each case the speech is portrayed as injurious and consequential. It is not depicted as neutral disagreement or simple criticism; the quoted contexts treat it as morally charged speech that attacks its object and tends to fracture relationships—within the household, between a person and the one named, or within a public gathering where many listeners are present.

Imagery

The passages attach vivid social scenes to κακολογέω: a household where the duty to honor parents is guarded even at the level of speech (Matthew 15:4; Mark 7:10); a moment where the name of Jesus stands at the center of public action and public words (Mark 9:39); and a crowded setting where hostile speech about “the Way” influences what a multitude hears, leading to a decisive separation and a new place for daily reasoning (Acts 19:9). In each, reviling is pictured as spoken harm that travels beyond the speaker, shaping the moral and communal atmosphere around its target.

Sources: Lexical data from Strong’s Exhaustive Concordance and the Translators Brief Lexicon of Extended Strongs for Greek (STEPBible, CC BY). Occurrence data from the Translators Amalgamated Greek New Testament (STEPBible, CC BY). Scripture quotations from the World English Bible (public domain).