赤い

1. Origins, structure, and basic meaning

• Structure: 赤い (あかい) combines the color stem 赤 with adjectival い as an i-adjective for red.
• Basic usage: 赤い directly modifies a noun or predicates color, while 赤く is the adverbial form used before another predicate.

2. Common pitfalls and similar expressions

• Dictionary and く forms
  • Both forms here express the color red without automatically adding a figurative sense.