Synonyms
catalyst,
energy,
goad,
impulse,
impulsion,
incentive,
incitation,
incitement,
momentum,
motivation,
power,
pressure,
push,
spur,
stimulantEtymology
[ 'im-p&-t&s ] (noun.) 1641. From Latin impetus (“a rushing upon, an attack, assault, onset”) impetere (“to rush upon, attack”) in (“upon”) + petere (“to seek, fall upon”).