IPA: /ˈfreɪlɪst/
KK: /freɪlɪst/
The weakest or most delicate in strength or health.
The frailest of the flowers bloomed first in the garden.
Comparative: frailer
Superlative: frailest
Frailest → It is formed from "frail" (from Old French *frayl*, meaning weak or delicate) and the superlative suffix "-est" (meaning most). The word "frailest" means the most weak or delicate among a group.
Think of something that is the "most delicate" or "weakest" — that's what frailest means.