ばっと

suddenly, in a flash, rapidly, nimbly, alertly

ずばっと

without hesitation, frankly (esp. speaking), bluntly, without shilly-shallying, straight to the point, getting to the heart of the matter

ばきっと

snapping (e.g. branch)

ばたっと

with a thud; with a flop; with a plop; with a snap; with a crash

ばさっと

with a flap; with a snap; with a thud; with a crash; with a swish; with a rustle

ばしっと

ばしっと

whack, smack

がたっと

with a clunk, with a clank

がらっと

がらっと

to burst open, to open suddenly (of a door)

とっとと

quickly, at once, right away, hurriedly

おっとっと

おっとっと

oops, that's enough (when pouring up alcohol, etc.)

がばがば

がばがば

over-sized

とろっと

トロッと

to become syrupy, to become thick (e.g. when cooking)

がったんごっとん

clickety-clack (e.g. train sound)

とば口

とばくち

entrance, threshold

ちっとやそっと

small amount, bit, smidgen

とっといて

save me some; put some aside for me

しっとりと

gently, softly

ずっと

ずーっと ずうっと

continuously in some state (for a long time, distance), throughout, all along, the whole time, all the way

ざっと

roughly, in round numbers