This is the 6875th most frequent Japanese word.
ヘビ
Snake.
Here, "ヘビ" (snake) is used as a noun referring to the animal.
この公園ではヘビを見ることができます。
You can see snakes in this park.
In this sentence, "ヘビ" (snake) is used metaphorically to describe the quiet motion of a person.
彼はヘビのように静かに動いた。
He moved quietly like a snake.
Here, "ヘビ" (snake) is part of a proper noun referring to a constellation.