bactericidally

Etymology tree
Ancient Greek βακτηρία (baktēría)
Proto-Indo-European *-yósder.
Ancient Greek -ῐος (-ĭos)?
Ancient Greek -ιον (-ion)
Ancient Greek βακτήριον (baktḗrion)bor.
New Latin bactēriumbor.
English bacteri(um)
Proto-Indo-European *kh₂eyd-der.
Proto-Italic *kaidō
Latin caedō
Proto-Indo-European *-h₂
Proto-Indo-European *-eh₂
Proto-Italic *-ā
Latin -a
Latin -cīdader.
Middle French -cidebor.
English -cide
Proto-Indo-European *h₂el-der.?
Proto-Italic *-ālis
Latin -ālisbor.
Old French -albor.
▲
Latin -ālis
Old French -elbor.
▲
Latin -ālisbor.
Middle English -al
English -al
English -cidal
English bactericidal
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 bactericidally
From bactericidal + -ly.