暖かい

1. Origins, structure, and basic meaning

• Structure: The spelling is 暖かい, read あたたかい, and it is an i-adjective describing comfortable warmth in weather, air, or an object.
• Basic usage: The basic sense of 暖かい is being warm enough to feel pleasant rather than cold, or providing a perceptible degree of warmth.

2. Common pitfalls and similar expressions

• Warmth in weather and an object
  • Both examples use the form 暖かい. The first describes mild, windless weather; the second describes the warmth of a blanket around the body.
• Predicate and noun-modifying positions
  • 今日は風がなくて暖かい。 — Today is warm and windless.
  • 暖かい毛布に包まれてすぐ眠った。 — I quickly fell asleep wrapped in a warm blanket.