An adverb in green-ink revisions from around 1970 to the Outline of Phonology (OP2). Its meaning is probably “sincerely, heartily”, but the second word is difficult-to-read (PE19/97). It was derived from ✶khomlō, originally an ablative form meaning “from the heart”. In this note Tolkien said ✶khō̆m “is not the physical heart, but ‘the interior’ used of the whole range of emotions or feelings”, but this is a reversal of his earlier ideas, since usually Tolkien described √KHOM as the physical rather than emotional heart.

Conceptual Development: Tolkien had more literal ᴹQ. holmo “from the middle” and ᴹQ. †humpe “in the middle” (the latter marked archaic) in the Declension of Nouns from the early 1930s (PE21/23).

Neo-Quenya: Despite the usual non-emotional meaning of its root, I would retain the meaning of the adverb holmo “sincerely, heartily” as the result of some semantic drift, used of actions performed enthusiastically and with conviction.