Callow is an adjective that means inexperienced and immature.

Our word of the day is derived from the Latin word calvus (KAL voose) which means ‘bald.’ This was often used to describe a young man who hadn’t come of age. As the word drifted into Old English and later evolved into callow, it came to mean ‘immature.’

At the time I made all those mistakes in life, I was too callow to understand what I was doing. Later in life, my maturity made me realize how foolish those mistakes were.