深

The depth of the lake was so great that we could not see the bottom.

The sea is not very deep there.

Don't go out of your depth in the sea.

deep breath/pool

make a deep/low bow (to sb)

dig deep into the earth

bury sth deep

What is the depth of the well?

He is standing in ankle-deep snow.

well of 20 metres deep

sound/plumb the depth of the water

The book is rather abstruse to him.

think deeply about sth

The two of them are already quite intimate with each other.

The colour of water deepens with its depth.

dark blue/green

dark/deep red; crimson

It was deep into the night.

The film is going over big with audiences.

He is head over heels in love.

share similar feelings; feel very much the same

be deep in debt

be profoundly grateful/regretful

be greatly favoured by the audience

be deeply moved; be greatly touched

be very much disappointed

be greatly disturbed; be very much worried

show deep/profound sympathy