strengthener

Từ điển WordNet v3.1 - WordNet Dictionary

noun

a device designed to provide additional strength
- the cardboard backing was just a strengthener
- he used gummed reinforcements to hold the page in his notebook
• Syn:
reinforcement
• Derivationally related forms:
reinforce (for: reinforcement), strengthen
• Hypernyms:
device
• Hyponyms:
backing, mount, brace, bracing, safety arch