出典:Wiktionary
From Middle English etlien, atlien, from Old Norse ætla (“to think, mean, suppose, intend, purpose”), from Proto-Germanic *ahtalōną (“to strive, think”), from Proto-Indo-European *ok- (“to think, intend, purpose”); partly from Middle English aghtelen, ahtlien (“to think, esteem, purpose, set out, arrange”), from a frequentative variant of 古期英語 eahtian (“to estimate, esteem, fix the character または quality of something, consult about, consider, deliberate, mediate, devise, watch over, speak of with praise”), from Proto-West Germanic *ahtōn (“to think, believe, fear”), from Proto-Germanic *ahwjaną (“to believe, intend, think, fear”), from Proto-Indo-European *okʷ-, *h₃ekʷ- (“to see”).
Cognate with Dutch achten (“to deem, regard, esteem, think”), German achten (“to heed, respect, value”), Danish agte (“to esteem, intend, observe, heed”), Gothic (ahjan, “to think”). More at eye.
ettle (三人称単数 現在形 ettles, 現在分詞 ettling, 過去形および過去分詞形 ettled)