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Webster 1828 Edition

ppr.

Expressing grief, sorrow, or censure; finding fault; murmuring; lamenting; accusing of an offense.

Noun.

The expression of regret, sorrow, or injury.

complaining

complaining ‎(plural complainings)

The act by which someone complaints; a complaint.
- 1863, Dinah Maria Craik, Mistress and maid
  Elizabeth […] wished he were beside her, and was so glad to think he would soon be beside her always, with all his humours and weaknesses, all his little crossnesses and complainings […]