dissimulative
/dɪˈsɪmjəˌleɪtɪv/
adjective
- Tending to hide or disguise true feelings, thoughts, or intentions; deceptive in manner.
- The negotiator used a dissimulative approach to gain an advantage.
- His dissimulative smile made everyone suspicious of his motives.
- She had a dissimulative personality that made it hard to know what she really thought.
Synonyms