慣らす

1. Origins, structure, and basic meaning

• Structure: 慣らす (reading ならす) is a godan transitive verb meaning to acclimate a person, body part, plant, or animal gradually to a new condition.
• Basic usage: It is used for getting one’s feet used to new shoes or acclimating seedlings to outdoor temperatures.

2. Common pitfalls and similar expressions

• Object and target condition
  • What is acclimated takes を, while the condition or environment can take に, as in 足を靴に慣らす.
• Contrast with 慣れる
  • 慣れる is intransitive: the subject becomes accustomed. 慣らす is transitive: someone causes that adjustment.