The yardlong bean is a type of vegetable that is long, slender, and frequently used in Asian dishes. Antonyms for the word "yardlong bean" might include "short," "stumpy," or "squat," as these words describe things that are compact or lacking in length. Other opposites might include "wide," "fat," or "thick," since these terms suggest a vegetable that is more rounded or substantial. Additionally, adjectives such as "crisp," "tender," or "soft" could be antonyms as they describe traits that are opposite to the fibrous texture of the yardlong bean. Ultimately, antonyms of the yardlong bean would describe a vegetable that is altogether different in shape, size, and flavor.