Hardening



ជាទម្រង់ Gerund ឬ Present Participle នៃ harden
noun
1.
(បច្ចេកទេស) ការធ្វើអោយកាន់តែរឹង
ENGLISH MEANING
noun
1.
Making hard or harder.
2.
That which hardens, as a material used for converting the surface of iron into steel.