"shallower" in the adjective sense
1. shallow
lacking physical depth having little spatial extension downward or inward from an outer surface or backward or outward from a center
"shallow water"
"a shallow dish"
"a shallow cut"
"a shallow closet"
"established a shallow beachhead"
"hit the ball to shallow left field"
2. shallow
not deep or strong not affecting one deeply
"shallow breathing"
"a night of shallow fretful sleep"
"in a shallow trance"
3. shallow
lacking depth of intellect or knowledge concerned only with what is obvious
"shallow people"
"his arguments seemed shallow and tedious"
Source: WordNet® (An amazing lexical database of English)
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