Syllable division derived from spelling — this word is not in the pronouncing dictionary, so no phonetic transcription is shown rather than a guessed one.
resistless is an adjective meaning "impossible to resist; overpowering". It carries 2 recorded senses.
impossible to resist; overpowering
“irresistible (or resistless) impulses”
“what happens when an irresistible force meets an immovable object?”
Definitions, synonyms and semantic relations for resistless come from Princeton University’s WordNet. Commonness is measured against a corpus of everyday English. Full sources and licences.