Explanation:

- The word "thaw" refers to the process of warming something to a state where it melts or becomes less solid.

- Option 1: Melt - This is actually a synonym of "thaw," as both involve becoming liquid through warming.

- Option 2: Warm - This is related to "thaw" since both involve increasing temperature.

- Option 3: Abandon aloofness - This is irrelevant in this context, as it pertains to social behavior, not temperature.

- Option 4: Freeze - This means turning something solid by lowering the temperature, which is the opposite of "thaw."