impalpable

definition: imperceptible to the senses or the mind
example: an impalpable cloud
speech part: adjective
synonyms:
definition: not perceptible to the touch
example: an impalpable pulse
speech part: adjective
synonyms:
definition: incapable of being perceived by the senses especially the sense of touch
example:
speech part: adjective
synonyms: intangible

How impalpable is being used?