We don't have synonyms for deep-felt yet — it may be a rare, specialized, newly coined, or misspelled word. The closest thesaurus entries we have are deep-set, deep-fet and deep fet.
(v) :
to empty or unload, as the vessels of human system, by bloodletting or by medicine; to reduce by destroying or consuming the vital powers of; to exhaust, as a country of its strength or resources, a treasury of money, etc
(v) :
to empty or unload, as the vessels of human system, by bloodletting or by medicine; to reduce by destroying or consuming the vital powers of; to exhaust, as a country of its strength or resources, a treasury of money, etc