IPA: //ˈɛrˌmoʊbəl//
KK: /ˈɛrˌmoʊbəl/
Able to be moved and deployed, often by helicopter, to different locations, especially in military operations.
The airmobile infantry regiment was quickly deployed to the conflict zone.
Airmobile is formed from "air" (from Old English "aer", meaning the atmosphere or sky) and "mobile" (from Latin "mobilis", meaning movable or capable of moving). The word describes something that is capable of moving through the air.
Think of 'air' as the atmosphere and 'mobile' as something that can move — together, they describe something that can move through the air.