IPA: /ˈhɛf.ti.ər/
KK: /ˈhɛftiər/
This word describes something that is heavier or more substantial than something else.
The heftier package was more difficult to lift than the smaller one.
Comparative: heftier
Superlative: heftiest
Heftier is derived from "hefty" (from the dialectal form of "heft" meaning heavy or weighty) and the suffix "-er" (meaning more). The word "heftier" means more heavy or weighty than something else.
Think of something that is 'more heavy' — 'hefty' means heavy, and '-er' indicates a comparison, so heftier means heavier.
No commonly confused words.