argumentatively

Etymology tree
Latin arguō
Proto-Indo-European *-mn̥
Proto-Indo-European *-mn̥tom
Proto-Italic *-mentom
Latin -mentum
Latin argūmentum
Proto-Indo-European *-h₂
Proto-Indo-European *-éh₂
Proto-Indo-European *-yéti
Proto-Indo-European *-eh₂yéti
Proto-Italic *-āō
Latin -ō
Latin argūmentor
Proto-Indo-European *-wós
Proto-Indo-European *-iHwósder.
Latin -īvus
Medieval Latin argūmentātīvusder.
Middle English argumentatif
English argumentative
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 argumentatively
From argumentative + -ly.