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sophomoric

adjective

/ˌsɒfəˈmɒrɪk/

Meaning

showing immaturity and overconfidence, like a sophomore

His sophomoric behavior embarrassed his friends.

immature, juvenile, naive, foolish

mature, wise, experienced

sophomoric humor, sophomoric attitude, sophomoric remark

Lasting for a very short time; temporary and fleeting.

Lacking in quantity or quality; inadequate.

higher in position or rank

showing fearlessness and determination

having an exaggerated sense of one's importance; proud

Capable of being imagined or conceived.