tsuyomarenai
1. Cannot be strengthened.; Cannot be made stronger.
★ Common
Verb
#1392708
1. Cannot be strengthened.; Cannot be made stronger.
1. to get strong; to gain strength
1. strengthened; increasingly
1. Strengthened; Grew stronger
1. Strengthening; Increasing
1. Is strengthening.; Is becoming stronger.
1. Don't strengthen.; Don't increase.
1. Strengthens; When strengthened
1. Strengthens; Grows stronger
1. Strengthened; Grew stronger