nonproductively

Etymology tree Proto-Indo-European *né Proto-Germanic *ne Proto-Indo-European *ís? Proto-Indo-European *h₁óynos Proto-Germanic *ainaz Proto-Germanic *nainaz Proto-West Germanic *nain Old English nān Middle English non ▲ Old English nān Old English nān- Middle English non- English non- 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 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 productively ▲ English non- ▲ English productive English nonproductive ▲ English -ly English nonproductively From non- + productively or nonproductive + -ly.

来源：wiktionary