kept it down (verb) mute: muffle, tone down sound
Sinonime: abounding,
abundant,
advantageous,
beneficial, blooming, blossoming, breeding, childing,
conducive,
copious,
effective,
fecund, fertile,
flourishing,
flush, fructiferous, gainful, plenteous,
plentiful,
profitable,
profuse, proliferant, prolific, propagating, reproducing,
rewarding, rich, spawning,
successful,
useful, well-spent,
worthwhileAntonime: barren, impotent, sterile, unfruitful, unproductive