deponently

Etymology tree
Proto-Indo-European *de
Proto-Indo-European *-h₁
Proto-Indo-European *déh₁
Proto-Italic *dē
Latin dē
Latin dē-
Proto-Indo-European *h₂ep
Proto-Indo-European *-o
Proto-Indo-European *h₂epó
Proto-Indo-European *h₂pó
Proto-Indo-European *teḱ-der.
Proto-Indo-European *tḱey-der.
Proto-Italic *sinō
Proto-Italic *pozinō
Old Latin *poznō
Latin pōnō
Latin dēpōnō
Latin dēpōnēnsder.
English deponent
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 deponently
From deponent + -ly.