This is the 2829th most frequent Japanese word.
黒岩
"黒岩" translates to "black rock" in English.
In this sentence, '黒岩' refers to a black rock, describing its physical attributes.
黒岩の上に苔が生えている。
Moss is growing on the black rock.
Here, '黒岩' is used as a surname indicating a teacher.
彼は黒岩先生の授業を受けています。
He is taking a class taught by Mr. Kuroiwa.
In this instance, '黒岩' represents the name of a place or region.