Origin: Latin suffix -tion
Inhalation has 3 different meanings across 1 category:
the act of inhaling; the drawing in of air (or other gases) as in breathing
"The sudden inhalation startled everyone in the quiet room."
a medication to be taken by inhaling it
"The doctor prescribed an inhalation for my asthma instead of pills I had to swallow."
The act of inhaling; inbreathing.
"The rhythmic sound of each inhalation could be heard clearly as she slept deeply."