並ぶ

並ぶ

"To line up" or "to be arranged."

Here, 「並ぶ」 is used to mean "stand in a line".

列に並ぶのが苦手です。

I dislike standing in line.

In this case, 「並ぶ」 refers to "being arranged (in a row)".

本が棚に並んでいる。

Books are lined up on the shelf.

Here, 「並べる」 (causative form of 並ぶ) is used to mean "to arrange in a line".

時計を並べて比較する。

Line up the watches and compare them.