excitant

motivator

annoyance energizer irritant mover pest prod spur

stimulator

desire feeling inclination influence instinct motivation motive notion passion thought whim wish

actuation appeal bent caprice catalyst disposition extemporization fancy flash goad hunch impulsion incitation incitement inspiration itch lash lust mind spontaneity spur urge vagary whimsy yen

impellent

concrete discouragement dislike hate hatred thing

reality truth

activation actuation catalyst goad goose impetus impulse incentive incitation inducement motivation motive needle prick stimulant trigger turnon urge

block deterrent discouragement hindrance prevention

curb

catalyst drug impetus stimulus

analeptic bracer energizer goad impulse incentive incitation incitement motivation motive pick-me-up restorative spur tonic upper

reviver shot in the arm spark plug

block hindrance

deterrent discouragement

depressant