Shallowest

adjective

1. Having little depth; significantly less deep than wide.

   "Saute the onions in a shallow pan."

2. Extending not far downward.

   "The water is shallow here."

3. Concerned mainly with superficial matters.

   "It was a glamorous but shallow lifestyle."

4. Lacking interest or substance.

   "The acting is good, but the characters are shallow."

5. Not intellectually deep; not penetrating deeply; simple; not wise or knowing.

   "shallow learning"