| intensely(fiercely, wildly, meticulously, ludicrously, deliriously) |
| irrationally(intensely, fiercely, wildly) |
| irregular |
| irresponsibly |
| laboriously(vigorously, earnestly, actively, hastily, carefully) |
| lickety split(expression, soon, swiftly, snappily, posthaste) |
| like all get out(expression, idiom, vigorously, earnestly, hastily) |
| like the devil(expression, idiom, vigorously, earnestly, hastily) |
| like the dickens(expression, idiom, vigorously, earnestly, hastily) |
| on spur of the moment(expression, idiom, adverb, hastily, impulsively) |
| on the double(expression, idiom, adverb, quickly, rapidly) |
| p.d.q. |
| painstakingly(vigorously, earnestly, actively, hastily, carefully) |
| perseveringly(vigorously, earnestly, actively, hastily, carefully) |
| persistently(vigorously, earnestly, actively, hastily, carefully) |
| post-haste |
| precipitantly |
| precipitously(hastily, suddenly, unexpectedly, impulsively, rashly) |
| prematurely(adverb, hastily, impulsively, rashly) |
| presto(adverb, quickly, rapidly, speedily) |