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latir (Verb) (of the heart) "to beat;" (of dogs) "to yelp"
Very early 14th cent. From Latin glattire "to yelp." Latin intial gl- could reduce either l- or ll- or both (Cf. Latin glans "acorn" to llande and lande). Of unknown origin.
Romance: Western Vulgar Latin: Portuguese latir, French glapir