IPA: /pərˈspaɪər/
KK: /pɚˈspaɪɚ/
To sweat or release moisture from the skin through tiny openings called pores.
When I exercise, I tend to perspire a lot.
Past: perspired
Past Participle: perspired
To release liquid through the skin, usually as a response to heat or exertion.
After running for an hour, I began to perspire heavily.
Past: perspired
Past Participle: perspired
Perspire is formed from "per-" (meaning through) and "spirare" (meaning to breathe). The word describes the process of breathing through the skin, which is how sweat is released from the body.
Think of 'breathing through' ('per-') the skin when you sweat — that's what perspire means.