glean (v.) Look up glean at Dictionary.com
early 14c., from Old French glener (Modern French glaner) "to glean," from Late Latin glennare "make a collection," perhaps from Gaulish (compare Old Irish do-glinn "he collects, gathers," Celt. glan "clean, pure"). Figurative sense was earlier in English than the literal one of "gather grain left by the reapers" (late 14c.). Related: Gleaned; gleaning.