depth

considerable, great

The ocean explorers discovered considerable depth in the trench they were studying.

shallow

The shallow depth of the pond made it perfect for young children to wade in safely.

abyssal

The submarine explored the abyssal depths where strange creatures live in complete darkness.

surprising, unexpected

The surprising depth of the ocean in that area made the divers nervous.

emotional

Her novels are admired for their emotional depth and honest portrayal of family relationships.

at ~

Divers need special training to work safely at depth in the ocean.

at/from/to a ~ of

The submarine descended to a depth of 3,000 metres below the ocean surface.

at/from/to a ~

The submarine can operate safely at depths of over 3,000 meters below the ocean surface.

in ~

The teacher explained the causes of climate change in depth during the science lesson.

out of your ~

When I started the new job, I felt out of my depth for the first few weeks.

~s of

She struggled to understand the depths of her father's anger after the accident.

the depths (of the ocean/sea)

Strange creatures live in the depths of the ocean that we have never seen before.

depth of emotion/feeling

Her letter revealed the depth of emotion she had kept hidden for years.