1. (

• toughen

) make tough or tougher; "This experience will toughen her" ;

1. (

• tough ,
• toughened ,

) physically toughened; "the tough bottoms of his feet" ;

2. (

• tempered ,
• treated ,
• hardened ,
• toughened ,

) made hard or flexible or resilient especially by heat treatment; "a sword of tempered steel"; "tempered glass" ;