This is the 9067th most frequent Russian word.
русалочка
"Русалочка" means "little mermaid" in English.
Here 'русалочка' is used as the subject of the sentence, representing a small mermaid, emphasizing its personification.
Русалочка сидела на камне у моря.
The little mermaid sat on the stone by the sea.
In this sentence, 'русалочка' is the object of the verb 'drew', referring to an imagined depiction of a small mermaid.
Моя дочь нарисовала красивую русалочку.
My daughter drew a beautiful little mermaid.
Here, 'русалочка' is part of a description identifying the subject matter of a movie, referring to a cultural or literary character.