strengtheners
nounUK /ˈstreŋθənəz/
US /ˈstreŋθənərz/
Things that make something stronger.
The builders used steel strengtheners to make the bridge hold more weight.
OTHER MEANINGS
2. People or things that make a feeling, idea, or group stronger.
Kind words are great strengtheners of friendship.
3. Substances added to materials to make them tougher.
The factory adds strengtheners to the plastic so it won't crack.
4. Exercises or activities that build muscle or ability.
Leg lifts are simple strengtheners for your knees.