► 動詞深める  [(3)ふかめる]    
meaning:  strong  rank: 2☆ 
学生達は
実地研修で
理解を深めた ⇨ The students deepened, reinforced, their understanding through hands-on training
☆ 
彼は
初期の
成功で
自信を深めた ⇨ He’s deepened, strengthened, his confidence by the early success
More examples:- 両国は相互理解を深めるための話し合いをした ⇨ The two countries had a discussion to deepen, strengthen, mutual understanding
 - 両国の親睦を深めるための催し物 ⇨ Events to foster good relationships between the two countries