Meaning

verb pass through the tissue or substance or its pores or interstices, as of gas

verb exude water vapor

verb come to light; become known

originBorrowed from Middle French transpirer, from Medieval Latin transpirare (“to breathe through”), from Latin trans (“across”) spirare (“to breathe”). The sense “to become known” is also present in French, while the sense “to happen” is not; the latter probably developed in English from the former.

Etymology from Wiktionary, CC BY-SA 3.0