Where does “aslumber” come from?

aslumber (English) comes from English A, from English AND, from Middle English and, from Old English and, from Proto-Germanic andi, from Proto-Indo-European h₂énti, from Proto-Indo-European h₂énts, from Proto-Indo-European h₂ent- — on, onto.

Ancestry of “aslumber”, step by step

aslumber traces back through two separate lines of ancestry.

via English A

StepLanguageWordMeaning
1EnglishAThe ordinal number first, derived from this...
2EnglishANDAlternative form of ∧, the conjunction operator;...
3Middle Englishandand, and then; however, yet, but, though. while;...
4Old Englishandand; even; also
5Proto-Germanicandiin addition, furthermore, and
6Proto-Indo-Europeanh₂éntiopposite; near; in front
7Proto-Indo-Europeanh₂éntsforehead; front
8Proto-Indo-Europeanh₂ent-face; forehead; front
9Proto-Indo-Europeanh₂en-on, onto

via English slumber

StepLanguageWordMeaning
1EnglishslumberA very light state of sleep, almost awake; A...
2Middle Englishslombren
3Middle Englishslummen
4Middle Englishslumento doze
5Old Englishslūmian
6Proto-Germanicslūm-A stem meaning: slack, loose, limp, flabby
7Proto-Indo-European(s)lew-to sludge, to wash; loose, limp, flabby; limp,...
Every word from Proto-Indo-European h₂en-Every word from Proto-Indo-European h₂ent-Every word from Proto-Indo-European h₂énts