ad-libbed (verb) ad-lib: improvise speech
Sinonime: absolve, aerate, aerify, atone, chasten, clarify, clean, cleanse, clear, decontaminate, deodorize, depurate, deterge, disinfect, edulcorate, elutriate, exculpate, exonerate, expiate, filter, fumigate, oxygenate, purge, rarify, redeem, refine, remit, sanctify, sanitize, shrive, sublimate, wash
Antonime: plan,
prepare, rehearse,
write