втечняване означава в английски

condensation [condensations]▼(physics: conversion of a gas to a liquid)
noun
[UK: ˌkɒn.den.ˈseɪʃ.n̩] [US: ˌkɑːn.dən.ˈseɪʃ.n̩]

liquefaction▼(Process of being made liquid)
noun
[UK: ˌlɪ.kwɪ.ˈfæk.ʃn̩] [US: ˌlɪ.kwə.ˈfæk.ʃn̩]