√KEN root. “see, perceive, note”
Tolkien first introduced this root in The Etymologies of the 1930s as a variant of ᴹ√KHEN “look at, see, observe, direct gaze” along with ᴹ√KYEN (EtyAC/KHEN). In The Etymologies it had no derivatives, but in the Quenya Verbal System it appeared with the gloss “see, perceive” as the basis for the verb ᴹQ. ken- of the same meaning (PE22/103). √KEN “see, perceive” appeared regularly in Tolkien’s writing thereafter (PE17/156, 187; PE22/155; VT41/5).
References ✧ PE17/156, 187; PE22/155; VT41/5
ᴹ√KEN¹ root. “see, perceive, look at, observe, direct gaze”
References ✧ EtyAC/KHEN; PE22/103