1. not able to be perceived by touch
1. For days after their quarrel, he felt as if an intangible, invisible wall were separating them.
2. During the days of the Swine Flu scare, an intangible but strong sense of paranoia filled the city.
in (not)#tangere (to touch) (Latin)
corporeal, palpable, tangible
in+tangible--- tangible means that can be touched, felt, intangible means the opposite can be understood as in+toungue+able -> when we put some food in the mouth (tongue) we can only feel the taste but cannot perceive it by touch.