Usage patterns
〈形容詞〉げattached to an adjective stem to describe an outward appearance of that quality
He had a sleepy-looking face.
〈形容詞〉げな〈物〉used as a na-adjective before a noun to describe its outward, seeming quality
She wore an anxious-looking expression.
Expressions
何気なくunintentionally; without thinking; casually; innocently 元気モリモリfull of energy; full of pep; bursting with vitality