Is it ensure, insure, or assure?
1530s, "action of breathing into," from Latin aspirationem (nominative aspiratio), noun of action from past participle stem of aspirare (see aspire). Meaning "steadfast longing for a higher goal, earnest desire for something above one" is recorded from c.1600 (sometimes collectively, as aspirations).
late 14c., "action of aspirating," noun of action from aspirate (v.).
aspiration as·pi·ra·tion (ās'pə-rā'shən)
The removal of a gas or fluid by suction.
The sucking of fluid or a foreign body into the airway when drawing breath.
A surgical technique used in the treatment of cataracts of the eye, in which an incision is made into the cornea, the lens capsule is severed, and the material of the lens is fragmented and aspirated by a needle.