The headword is present participle of the epic/poetic verb thleqa/w, masculine accusative singular or neuter nominative plural. It will be the latter if, as is likely, the word is quoted from Homer, Odyssey 7.114 or 13.196 (in both of which passages it describes trees); the glossing, though, is a little odd (compare the superior a)/gan qa/llonta in the scholia to Odyssey 13.196).