資料來源 : pyDict

韌化

資料來源 : Webster's Revised Unabridged Dictionary (1913)

Toughen \Tough"en\, v. i. & t. [imp. & p. p. {Toughened}; p. pr.
   & vb. n. {Toughening}.]
   To grow or make tough, or tougher.