みかけによらない
does not match (one's, its) appearance
Also written 見掛けによらない、見掛けに依らない
Expression
人ひとは見みかけによらない。
A man cannot be judged by his appearance.
「人ひとは見みかけによらない」とはよく言いったものですね。
It's well said that "You can't judge people by their appearance", isn't it?