The opposite of "pride" (a sense of self-importance or arrogance) is "humility" (modesty or a lack of arrogance).
- Chill refers to a cold sensation or relaxed attitude, unrelated to pride.
- Solicit means to ask for something, which is not the opposite of pride.
- Hum refers to making a sound or noise, unrelated to pride.
Thus, the correct answer is "humility".