入れる

1. Origins, structure, and basic meaning

• Structure: 入れる is read as いれる and is a transitive verb meaning to put something inside a space or bring an item such as furniture into a room.
• Basic usage: Putting books in a bag appears in かばんに本を入れる, while bringing a desk into a room appears in 部屋に机を入れる.

2. Common pitfalls and similar expressions

• Destination に and object を
  • Mark the destination with に and the object being put or brought in with を.
• Difference from 入る
  • Unlike the intransitive 入る for something entering, 入れる is transitive and takes the thing being put in as its object.