Ranked by relevance and common usage.
Keep "undutiful" when the sentence already sounds natural, when a synonym would add unintended emphasis, or when readers need the most familiar wording. A synonym should clarify or sharpen the message, not simply make the sentence look more varied.
If two options seem close, choose the one that best matches the audience and purpose of the sentence.
Choose a synonym only if it keeps the core idea of "undutiful" intact in the sentence you are editing.
Check whether the replacement sounds more formal, casual, emotional, technical, or forceful than the original word.
Read the full sentence after the swap. Keep the synonym only when the sentence becomes clearer or more precise.
Review note: Synonym lists are ranked with lexical data and reviewed for practical writing value. Use the comparison notes, sentence evidence, and source labels together; a high-ranking synonym can still be wrong when the audience, register, or grammar changes.
After choosing a replacement for "undutiful", read the sentence once for meaning and once for rhythm. The best synonym should feel natural in the full sentence, not only accurate in a word list.
If the synonym makes the sentence slower, vaguer, or more dramatic than intended, keep "undutiful" or choose a simpler alternative from the closest-match group.
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
8 total sentences available.
Lady Stair sent him for answer, that her daughter, sensible of her undutiful behaviour in entering into a contract unsanctioned by her parents, had retracted her unlawful vow, and now refused to fulfil her engagement with him.
Source: tatoeba (7752075)
For, as long as he liv’d, ’twas his comfort and joy, to think he’d not been an undutiful boy.
Source: tatoeba (11620127)
I know my duty; you are all undutiful: Lascivious Edward, and thou perjured George, And thou mis-shapen Dick, I tell ye all I am your better, traitors as ye are: And thou usurp’st my father’s right and mine.
Source: wiktionary
1652, George Herbert, A Priest to the Temple, or, The Countrey Parson, reproduced in George Herbert Palmer (ed.), The English Works of George Herbert, Boston: Houghton Mifflin, 1905, Volume 2, Chapter 6. The Parson Praying, p. 27, Besides his example, he, having often instructed his people how to carry themselves in divine service, exacts of them all possible reverence, by no means enduring either talking, or sleeping, or gazing, or leaning, or halfe-kneeling, or any undutifull behaviour in them, but causing them when they sit, or stand, or kneel, to do all in a strait and steady posture, as attending to what is done in the Church, and every one, man and child, answering aloud both Amen and all other answers which are on the Clerk’s and people’s part to answer […]
Source: wiktionary
Showing 4 of 8 available sentences.
Closest matches include apostate, atheistic, backsliding, blasphemous, careless.
Compare the replacement against real sentence context. This entry includes sample sentences so you can check tone, grammar, and meaning before swapping words.