Antonyms of adj brawny

1 sense of brawny

Sense 1
brawny, hefty, muscular, powerful, sinewy -- ((of a person) possessing physical strength and weight; rugged and powerful; "a hefty athlete"; "a muscular boxer"; "powerful arms")

INDIRECT (VIA strong) -> weak -- (wanting in physical strength; "a weak pillar")

Similarity of adj brawny

1 sense of brawny

Sense 1
brawny, hefty, muscular, powerful, sinewy -- ((of a person) possessing physical strength and weight; rugged and powerful; "a hefty athlete"; "a muscular boxer"; "powerful arms")
       => strong (vs. weak) -- (having strength or power greater than average or expected; "a strong radio signal"; "strong medicine"; "a strong man")