unhesitatively

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Germanic *un- Proto-West Germanic *un- Old English un- Middle English un- English un- Latin haereō Proto-Indo-European *-h₂ Proto-Indo-European *-éh₂ Proto-Indo-European *-yéti Proto-Indo-European *-eh₂yéti Proto-Italic *-āō Latin -ō Latin -tō ▲ Latin -tō Latin -itō Latin -titō Latin haesitō Latin haesitātusbor. English hesitate Proto-Indo-European *-wósder. Latin -īvus Old French -ifbor. Middle English -yf English -ive English hesitative Proto-Indo-European *leyg- Proto-Germanic *līkąder. Proto-Germanic *-līkaz Proto-Germanic *-ê Proto-Germanic *-līkê Old English -līċe Middle English -ly English -ly English hesitatively English unhesitatively From un- + hesitatively.

来源：wiktionary