IPA: /ɪnˈtændʒəblnəs/
KK: /ɪnˈtændʒəblnəs/
The quality of being unable to be touched or physically measured; something that cannot be perceived by the senses.
The intangibleness of her emotions made it difficult for him to understand her feelings.
Intangibleness is formed from "intangible" (from Latin "intangibilis", where "in-" means not and "tangere" means to touch) and the suffix "-ness" (meaning the state or quality of). The word refers to the quality of being unable to be touched or grasped physically.
Think of 'not touching' ('in-' means not and 'tangere' means to touch) to remember that 'intangibleness' refers to the quality of being unable to be physically touched.