shallowness
1. [ noun ] lack of depth of knowledge or thought or feeling
Synonyms: superficiality
Related terms: profundity depth glibness sciolism
2. [ noun ] the quality of lacking physical depth
Examples:

: "take into account the shallowness at that end of the pool before you dive"

Related terms: deepness depth superficiality
Similar spelling:   sallowness
  slowness