Answer: shallower

AnswerCrossword Clue
SHALLOWERMore superficial
SHALLOWERPreferable for new swimmers
SHALLOWERComparatively superficial
shallowerNot exhibiting, requiring, or capable of serious thought
shallowerVarying only slightly from a specified or understood line or direction, esp. the horizontal
shallower(of breathing) Taking in little air
shallowerSHALLOW, having little depth
shallowerOf little depth
shallowerSituated at no great depth