[swimmer, bird] plonger
→ Joanne had just learnt to dive.
→ a pelican which had just dived for a fish
to dive in
[swimmer] faire un plongeon
→ He was standing by the pool, about to dive in.
to dive into sth [+river, sea] plonger dans qch, se jeter dans qch
→ He tried to escape by diving into a river.
to dive down plonger
→ The shark dived down and swam under the boat.
to dive off sth [+rock, cliff, diving board] plonger de qch, plonger du haut de qch
→ We watched the birds diving off the cliffs.