In American, air-sole?*smile*!
Note: The above Swear filtered word (thanks @Mr T.) is not a four letter word! No indeed! This is an eight letter word with two syllables. First syllable rhymes with "farce" and the last syllable rhymes with "antiprotozoal" which refers to a drug used to treat protozoal infections which are transmitted from human to human through the blood-fecal route.
... I'll let you work through the relevance of the two rhymes.