noun
Refers to the measurable degree of physical strength, durability, or intensity of a phenomenon (e.g., material strength, earthquake intensity).
この素材は強度が高い。
This material has high strength.
地震の強度はマグニチュードで表される。
The intensity of an earthquake is expressed in magnitude.
noun which may take the genitive case particle 'no'
strong; powerful; intense; extreme
Used adjectivally with の to describe the degree of something abstract or functional, such as lens power, fear, or extremity.
強度の近視なので、眼鏡が厚い。
Because I have severe myopia, my glasses are thick.
彼は強度の不安を感じている。
He feels intense anxiety.
Compound of 強 (strong) and 度 (degree). The meaning 'degree of strength' is transparent from its components.