Depth
Profundity
noun
This is the noun version of the kanji deep, so it means depth.
Since this word consists of a kanji with hiragana attached, you can bet that it will use the kun'yomi reading. You already learned this reading when you learned 深い so you should be able to read this one too!
味の深さ
depth of flavor
川の深さ
river depth
ふところの深さ
how broad-minded one is, the width of a sumo wrestler's chest
深さが深い
the depth is deep
深さがない
there's no depth
深さがある
to have depth
深さは２０メートル
the depth is 20 meters
深さは３０センチ
the depth is 30 centimeters
深さはそんなにない
there isn't that much depth
このプールの深さを教えて下さい。
Could you tell me the depth of this pool?
コウイチの知えの深さははかり知れない。
The profundity of Koichi's wisdom is off the scale.
ビエトが、週末に百メートルの深さの落としあなをほったと自まんしていました。
Viet was bragging that he dug a hundred meter deep pit over the weekend.