IPA: /əbˈzɔːrbənsi/
KK: /əbˈzɔrbənsi/
The ability of a material to take in or soak up liquids or gases.
The absorbancy of the sponge makes it ideal for cleaning spills.
Absorbancy is formed from "ab-" (meaning away) and "sorbere" (meaning to suck or swallow). The word describes the quality of being able to suck or take in moisture or liquid, hence the ability to absorb.
Think of something that 'sucks in' ('sorbere') liquid 'away' ('ab-') — that's why absorbancy refers to the ability to take in moisture.
No commonly confused words.