naらすrasunaらすrasu
1.

To facilitate adaptation to a new environment or situation by repeated exposure or practice, allowing one to become familiar or comfortable with it.

2.

To train animals to respond to commands or behave in a desired manner, often by habituating them to human interaction.

3.

To make someone or something accustomed to a certain condition or behavior, sometimes implying a loss of caution or awareness due to over-familiarity.

Example:

このライオンはよく飼い馴らされている。