浅

The room is not deep.

shallow brook/lake

shallow/shoal water

shallow dish

have a superficial understanding of a problem

know little of the world; have superficial knowledge of the world

have superficial mastery of a skill

These reading materials are simple in contents and easy to understand.

Dark-dyed clothes often fade with washing/in the wash.

light in colour

light/pale blue

pale yellow

light red

be new in a business

have not been together long

not on familiar/intimate terms

She is a light sleeper.