noun
leg opening
Refers to the opening for the leg in garments like panties, swimsuits, or bodysuits. Common in fashion and sewing contexts.
この水着は足ぐりが深くて動きやすい。
This swimsuit has deep leg openings and is easy to move in.
パンツの足ぐりにゴムを縫い付ける。
Sew elastic into the leg openings of the panties.
Compound of 足 (あし, leg) and 刳り (ぐり, hollowing out), from the verb 刳る (くる, to hollow out). The kanji 刳り is often replaced by the phonetic ぐり.