IPA: /ˈmʌltiˌɑrmd/
KK: /mʌltiˈɑrmd/
Having several arms or extensions.
The multiarmed robot was able to perform multiple tasks at once.
Multiarmed → It is formed from "multi-" (meaning many) and "armed" (from Old English "earm", meaning equipped or furnished). The word describes something that is equipped with many arms or limbs.
Think of 'many' ('multi-') and 'equipped' ('armed') to remember that 'multiarmed' refers to something that has many arms.
No commonly confused words.