Dictionary / Vocabulary / 角釘
かくくぎ
square nail; square peg
Also written 角くぎ
ジョンとキャシーは興味も性格も違う。その二人を一緒にさせようとするのは丸穴に角釘を打つようなものだ。
John and Cathy have different tastes and different characters. Trying to get them together is like putting a square peg in a round hole.