最低

1. Origins, structure, and basic meaning

• Structure: The noun and adjectival noun 最低 (さいてい) denotes a minimum threshold and, evaluatively, something regarded as the worst.
• Basic usage: 最低年齢 is a lower age limit, while 最低だ strongly condemns someone's conduct.

2. Common pitfalls and similar expressions

• Minimum threshold and harsh condemnation
  • It can denote a numerical lower bound or a severe judgment of conduct; the latter is very harsh in interpersonal use.