unstrained

Từ điển WordNet v3.1 - WordNet Dictionary

adjective

1. not placed under psychological stress
- the campaign would not leave party loyalties unstrained
• Similar to:
relaxed
2. not resulting from undue effort;
not forced
- a voice with a pleasingly unforced quality
- his playing is facile and unstrained
• Syn:
unforced
• Similar to:
effortless