Hard to define and Intangible

Intangible and hard to define are semantically related. In some cases you can use "Intangible" instead an adjective phrase "Hard to define".

Intangible adjective - Not capable of being perceived by the sense of touch.

Hard to define and intangible are semantically related. You can use "Hard to define" instead an adjective "Intangible".

Nearby Words: intangibility, intangibly