Scottish National Dictionary (1700–)
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First published 1952 (SND Vol. III).
This entry has not been updated since then but may contain minor corrections and revisions.
†CRUTLACHIN, ppl.adj. “Conversing in a silly tattling way” (n.Sc. 1808 Jam.).
[Prob. the same word as cruttle, to make a low, chattering sound (see Kruttle), with dim. suff. -ach.]