Early Primitive Elvish
teŋe
root. know, understand
aha
root. know
ŋolo
root. to know
Beware, older languages below! The languages below were invented during Tolkien's earlier period and should be used with caution. Remember to never, ever mix words from different languages!
A root in the Qenya Lexicon of the 1910s glossed “know”, but most of its derivatives have to do with “mind” (QL/29). There are quite a few later roots filling this same semantic space, and this root was probably abandoned.