He had been ill for a long time and looked utterly listless.
Tips
history
恹 is not used on its own; it occurs only in the reduplication 恹恹 (listless, languid), often in 病恹恹 (sickly and weak). It joins the heart radical 忄 with the phonetic 厌.
register
Literary and bound; appears only in 恹恹 and 病恹恹, not as a free word in speech.
