What is the Thai word for "slow"?

The Thai word for "slow" is indeed represented by the term that translates to it directly, which is "ช้า." This word accurately conveys the concept of slowness in various contexts, whether discussing speed, pace, or the rate of occurrence.

To provide further context for understanding the other words: "เร็ว" translates to "fast" or "quick," which is the opposite of "slow." "ร้อน" means "hot," referring to temperature, while "หนาว" means "cold," also relating to temperature. These words do not relate to speed or pace, which is the specific meaning captured by "ช้า."