From Middle English loken, lokien, from Old English lōcian (“to see, behold, look, gaze, observe, notice, take heed, belong, pertain, regard with favor”), from Proto-Germanic *lōkōną, *lōgēną (“to look”) (compare West Frisian loaitsje, Middle Dutch loeken), German dialectal lugen (“to look out”)), from Proto-Indo-European *lAg- (“to look, see”) (compare Welsh llygad (“eye”), Tocharian AB läk- (“to see”), Sanskrit लक्षति (lakṣati, “he sees, perceives”)).
