A verb in The Etymologies of the 1930s for “kindle” derived from the root ᴹ√NARTA of the same meaning (EtyAC/NARTA). This root is probably just a causative verb formation from ᴹ√NAR “flame, fire”, more literally “✱make fire”. Hence I think this verb can be used in the general sense of “✱ignite, inflame, set fire to”, etc.
Qenya
tunda
adjective. tall
tundo
noun. hole
halda
adjective. tall
narta-
verb. to kindle, to kindle, *ignite, inflame, set fire to
An adjective for “tall” in The Etymologies of the 1930s derived from primitive ᴹ✶tundā under the root ᴹ√TUN (Ety/TUN).