1The physical process by which a liquid turns into a gas, such as water becoming vapor through heat.
湖の水が夏の暑さで蒸発する。
The lake water evaporates in the summer heat.
アルコールは水より蒸発しやすい。
Alcohol evaporates more easily than water.
洗濯物の水分が蒸発して乾いていく。
The moisture in the laundry evaporates as it dries.
2Colloquial: for a person to suddenly disappear and become untraceable, vanishing without a trace.
彼は借金苦から蒸発してしまったらしい。
It seems he disappeared because of his debt problems.
ある日突然、彼女は蒸発するように町を去った。
One day, she left town as if she had simply vanished.