IPA: /ˈstrɛŋθənər/
KK: /ˈstrɛŋθənər/
An item or substance that is used to increase strength or support something.
The contractor used a strengthener to reinforce the structure of the building.
Strengthener → It is formed from "strength" (from Old English "strengþ", meaning power or force) and "-ener" (a suffix indicating a person or thing that performs a specific action). The word "strengthener" refers to something that provides or increases strength or power.
Think of something that 'provides power' ('strength') and is a 'thing that does' ('-ener'). A strengthener is something that helps you become stronger.