Question

Another way to define prolific could be:

underwhelmed
abundant
eager
disengaged

Answer 1

well, prolific means ''plentiful'' so it would only be related to ''abundant'', which means basically the same thing, ''plenty of/large quantities''.

<3

Answer 2

Similar:

crafty

wily

artful

guileful

devious

sly

knowing

scheming

designing

tricky

slippery

slick

manipulative

Machiavellian

deceitful

deceptive

duplicitous

Janus-faced

shrewd

astute

clever

canny

sharp

sharp-witted

skillful

ingenious

resourceful

inventive

imaginative

deft

adroit

dexterous

foxy

savvy

fiendish

sneaky

fly

pawky

slim

subtle

vulpine

carny

Opposite:

honest

guileless

naive