A weak verb appearing in notes from the late 1950s or early 1960s based on the root √LEÑ having to do with behavior (PE17/74). Tolkien marked through the paragraph where the verb appeared in the process of rejecting the adverbial suffix -lë, but retained the related noun lé “way, method, manner” in the following paragraph.

Neo-Quenya: I’d retain ᴺQ. lenga- “to behave” for purposes of Neo-Quenya.