improductively

Etymology tree Proto-Indo-European *né Proto-Indo-European *n̥- Proto-Italic *ən- Latin im- English im- Proto-Indo-European *per-der.? Proto-Indo-European *per-der.? Proto-Indo-European *pér Proto-Indo-European *-o Proto-Indo-European *pró Proto-Indo-European *pro- Proto-Italic *pro- Late Latin prō- Proto-Indo-European *dewk- Proto-Indo-European *déwkti Proto-Italic *doukō Late Latin dūcō Late Latin prōdūcō Proto-Indo-European *-wósder. Late Latin -īvus Late Latin prōductīvusbor. English productive English improductive 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 improductively From improductive + -ly.

来源：wiktionary