dissimulation
noun [ U ] formal uk/ˌdɪsˌsɪm.jəˈleɪ.ʃən/ us/ˌdɪsˌsɪm.jəˈleɪ.ʃən/
（对动机、感情、真相等的）掩盖，掩饰
the fact of trying to hide your real feelings, character, or intentions
He was capable of great dissimulation and hypocrisy. 他擅于假装与伪善。
Synonyms: deceitdeception