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INTERMEDIATE LEVEL
Content
incapable, incompetent, ineffective, impotent, powerless, helpless; impotence ☊ 
bất lực ☊
无奈 → ☊ wu2nai4 helpless; without choice; for lack of better option; grudgingly; willy-nilly; nolens volens; abbr. for 无可奈何/无可奈何wu2 ke3 nai4 he2 ☊ Bất lực ☊
无能为力 → ☊ wu2neng2wei2li4 impotent (idiom); powerless; helpless ☊ Bất lực ☊
→ → →
OXF3000N 
bất lực không có khă năng 
disabled
OXF3000N sự bất lực bất tài inability
→ → →
like: bất lực → →
He could only watch helplessly as the car plunged into the ravine. ☊ only ☊