impalpable
adjective /ɪmˈpælpəbl/
/ɪmˈpælpəbl/
(formal)- that cannot be felt physically
- very difficult to understand opposite palpable
Word Originearly 16th cent.: from French, or from late Latin impalpabilis, from in- ‘not’ + palpabilis, from Latin palpare ‘feel, touch gently’.