Third person singular present tense of 'aline'; arranges or aligns.
From Old French 'aligner', Latin 'ad' (to) + 'linea' (line). The 's' is the standard English present-tense marker for third person.
The verb 'aline' is basically dead in modern English, replaced by 'align,' but linguistic fossils like this help us trace how words sound when they're actively changing.
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