dabble

verbs

dip a foot or hand briefly into a liquid
is a type of (narrower)
immerse briefly into a liquid so as to wet, coat, or saturate
"dip the garment into the cleaning solution"; "dip the brush into the paint"
play in or as if in water, as of small children
work with in an amateurish manner
"She dabbles in astronomy"; "He plays around with investments but he never makes any money"
is derived from
bob forward and under so as to feed off the bottom of a body of water
"dabbling ducks"
is a type of (narrower)
move up and down repeatedly
"her rucksack bobbed gently on her back"