Classification – Pure temperature adjectives vs heat-humidity condition: three words denote temperature level only; one specifically denotes hot and humid conditions. Which is the odd one out? Options: Cool, Warm, Sultry, Hot.

Introduction / Context:
Weather descriptors can denote temperature alone or a composite of temperature and humidity. That semantic difference separates one option from the rest.

Given Data / Assumptions:

• Cool: low temperature sensation.
• Warm: moderately high temperature.
• Hot: high temperature.
• Sultry: oppressively hot and humid (sticky air), not just “hot.”

Concept / Approach:
Group by semantic scope: temperature-only adjectives versus a combined heat-humidity condition.

Step-by-Step Solution:
Cool/Warm/Hot describe temperature intensity alone.Sultry encodes humidity along with heat.Thus, Sultry is the odd one out.

Verification / Alternative check:
Standard dictionaries define “sultry” with explicit humidity, making it categorically different from purely thermal adjectives.

Why Other Options Are Wrong:
Cool/Warm/Hot: Each is a unidimensional temperature descriptor.

Common Pitfalls:
Equating “sultry” with “hot”; humidity is integral to the meaning and is what makes it oppressive.

Final Answer:
Sultry