ag, act
to drive, to do
cit
to stir up, to rouse
turb
to disturb
alacr
lively
celer
quick
cogent
(adj.) strong and to the point; convincing
exigent
(adj.) urgent, pressing
assay
(v) to test, analyze
intransigent
(adj.) refusing to compromise
incite
(v) to stir up; to provoke
resuscitate
(v) to bring back to consciousness
solicitous
(adj.) showing care or worry
perturb
(v) to make worried or upset
turbulent
(adj.) very excited or upset
turbid
(adj.) cloudy, confused)
alacrity
(n) an enthusiastic quickness
celerity
(n) speed or quickness