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 *-wós
Proto-Indo-European *-iHwósder.
Late Latin -īvus
Late Latin prōductīvusbor.
English productive
Proto-Indo-European *leyg-der.
Proto-Germanic *līkąder.
Proto-Germanic *-līkaz
Proto-Germanic *-ê
Proto-Germanic *-līkê
Proto-West Germanic *-līkē
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.