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sinsyne

[ sin-sahyn ]
/ ˈsɪn saɪn /
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adverb Scot. and North England.
from that time; since then.
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Origin of sinsyne

1325–75; Scots and Northern dialect sin subsequent to, after (Middle English, variant of sithen,Old English siththansith) + syne; replacing Middle English (Scots ) sensyne (sen, variant of sethen, variant of sithen;see since)
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2022

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