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from Old French acoler, formed on a to + col neck.
Spelling afterwards assimilated to mid. French accoller (modern French accoler).
Cf. Italian accollare suggesting a late Latin or early Romanic accollāre, formed on ac- = ad- to + collum neck
From: Poetical Works of Henry Howard, Earl of Surrey
Minor Contemporaneous Poets and Thomas Sackville, Lord Buckhurst
Edited by Robert Bell, 1854
The Second Book of Virgil's Aeneid. P. 175