すみにそまればくろくなる

墨に染まれば黒くなる

表記・読み：すみにそまればくろくなる

1. 1

   people are formed by their surroundings; walk with the wise and become wise; associate with fools and get in trouble; that which is dyed with ink becomes black

   expressions (phrases, clauses, etc.)五段動詞（る）proverb