出典:Wiktionary
From Middle English alighten, from a merger of 古期英語 ālīhtan (“to alight, dismount”), from prefix ā- (compare Gothic - (us-), German er- originally meaning "out") + līhtan (“to alight”); and 古期英語 ġelīhtan (“to alight, approach, come, come down, dismount”); equivalent to alight + -en.
From Middle English alighten, from a merger of 古期英語 ālīhtan (“to lighten, relieve, alleviate, take off, take away, alight”) and 古期英語 ġelīhtan (“to lighten, mitigate, assuage”); equivalent to a- + lighten.
alighten (三人称単数 現在形 alightens, 現在分詞 alightening, 過去形および過去分詞形 alightened)
From Middle English alighten, from 古期英語 ālīhtan (“to light up, enlighten”); equivalent to a- + light. Cognate with German erleuchten (“to light up, illuminate”).