| discretionary |
| down(adjective, simple, natural, casual, impulsive) |
| elective |
| emotional(adjective, passionate, violent, thoughtless, abrupt) |
| extempore(adjective, simple, natural, casual, impulsive) |
| flaky(adjective, passionate, violent, thoughtless, abrupt) |
| free spirited(expression, adjective, simple, natural, casual) |
| free will |
| from the hip(expression, adjective, idiom, simple, natural) |
| gone off deep end(expression, adjective, idiom, passionate, violent) |
| hasty(adjective, passionate, violent, thoughtless, abrupt) |
| headlong(adjective, passionate, violent, thoughtless, abrupt) |
| hostile |
| hot-and-cold(adjective, passionate, violent, thoughtless, abrupt) |
| improvisatory |
| improvise |
| impudent(adjective, willing, arrogant, voluntary, unwelcome) |
| inevitable(adjective, simple, natural, casual, impulsive) |
| irresistible(adjective, simple, natural, casual, impulsive) |
| jumping the gun(expression, adjective, idiom, passionate, violent) |