性 (Kanji for sex / essential nature)

Onyomi

SEI, SHOU

SAY you'll SHOW me the sex!

Sex is the part of life closest to the heart.

可能性(かのうせい) の or が	possibility ★★★★☆ 可 (possible) + 能 (talent) + 性 (sex / essential nature) = 可能性 (possibility)
女性(じょせい)	female ★★★☆☆ 女 (woman) + 性 (sex / essential nature) = 女性 (female) female - emphasizes biology, (sex, rather than gender).
男性(だんせい)	male ★★★☆☆ 男 (man) + 性 (sex / essential nature) = 男性 (male)
XXX 性(せい)	-ity ★★★☆☆ SUF SUFFIX which turns an adjective into a noun: possible+性=possibility. creative+性=creativity. 男性　＝ man, but 男性性＝ masculinity.
性病(せいびょう)	STD ★☆☆☆☆ 性 (sex / essential nature) + 病 (sick kanji) = 性病 (STD) what you got from your pops.