IPA: /ɪˈrɛkʃən/
KK: /ɪˈrɛkʃən/
The state when a body part, especially the penis or clitoris, becomes firm and enlarged due to being filled with blood.
The doctor explained the physiological process of erection during the health class.
Erection → It is formed from "e-" (a variant of "ex-", meaning out) and "regere" (meaning to rule or to set straight). The word "erection" refers to the act of setting something up or raising it up, as in a structure or physical state.
Think of something being 'set up' or 'raised up' — 'e-' means out, and 'regere' means to rule or set straight.