different between pining vs heartless

English

pining

pining (plural pinings)

The act of one who pines.
- 1791, Ann Radcliffe, The Romance of the Forest
  the sullen pinings of discontent

From Middle English hertles, herteles, from Old English heortl?as (“without courage; listless”), equivalent to heart +? -less.

heartless (comparative more heartless, superlative most heartless)

(obsolete) Without courage; fearful, cowardly. [10th–19th c.]
- 1782, Frances Burney, Cecilia, II.iii.7:
  Cecilia then, though almost heartless, resolved upon talking with Mr. Harrel himself […].
(now rare) Listless, unenthusiastic. [from 14th c.]
Without a physical heart. [from 15th c.]
Without feeling, emotion, or concern for others; uncaring. [from 16th c.]
His heartless actions and cold manner left her saddened and feeling alone.

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