What is the meaning of dissembling?

noun

• Pretending with intention to deceive.
  • synonyms: pretense, pretence, feigning
• The act of deceiving.
  • synonyms: deception, deceit, dissimulation

verb

• Make believe with the intent to deceive.
  • usage: "He feigned that he was ill"; "He shammed a headache"
  • synonyms: feign, sham, pretend, affect, dissemble
• Hide under a false appearance.
  • usage: "He masked his disappointment"
  • synonyms: dissemble, cloak, mask
• Behave unnaturally or affectedly.
  • usage: "She's just acting"
  • synonyms: dissemble, pretend, act