計る

1. Origins, structure, and basic meaning

• Structure: 計る(はかる) means measuring something such as time or gauging circumstances and intentions.
• Basic usage: It is used for judging the time needed or trying to understand another person's intentions.

2. Common pitfalls and similar expressions

• The scope of 表情だけでは
  • 表情だけでは計り知れない means that something cannot be gauged from facial expressions alone.
  • The limitation concerns relying only on facial expressions; it does not assert that no method could reveal the answer.
• Other spellings of はかる
  • 測る(はかる) is used for measuring length or height, while 量る(はかる) is used for measuring weight or volume.