approfondir w języku angielskim

deepen [deepened, deepening, deepens]▼◼◼◼(to make deep or deeper)
verb
[UK: ˈdiː.pən] [US: ˈdiː.pən]You deepened the holes. = Tu approfondissais les trous.

elaborate [elaborated, elaborating, elaborates]▼◼◼◻(to give further detail or explanation)
verb
[UK: ɪ.ˈlæ.bə.reɪt] [US: ə.ˈlæ.brət]

drill [drilled, drilling, drills]▼◼◼◻(to investigate closer)
verb
[UK: drɪl] [US: ˈdrɪl]