The term 'drain unclogger' can be summarized by the three-letter word 'LYE'. LYE is a type of alkaline solution that is commonly used to unclog drains. It is a strong base that is capable of breaking down organic matter, such as grease and hair, which can cause clogs in pipes. LYE is also known for its ability to dissolve soap scum and other mineral deposits. When used correctly, LYE can be an effective tool for unclogging drains.