сгъстяван означава в английски

thicken [thickened, thickening, thickens]▼((transitive) to make more viscous)
verb
[UK: ˈθɪkən] [US: ˈθɪkən]

compression [compressions]▼(the act of compressing)
noun
[UK: kəm.ˈpreʃ.n̩] [US: kəm.ˈpreʃ.n̩]

concentration [concentrations]▼(act or process of concentrating)
noun
[UK: ˌkɒn.sən.ˈtreɪʃ.n̩] [US: ˌkɑːn.sən.ˈtreɪʃ.n̩]

condensation [condensations]▼(the act or process)
noun
[UK: ˌkɒn.den.ˈseɪʃ.n̩] [US: ˌkɑːn.dən.ˈseɪʃ.n̩]

fixation [fixations]▼(act of uniting chemically in a solid form)
noun
[UK: fɪk.ˈseɪʃ.n̩] [US: fɪk.ˈseɪʃ.n̩]

thickening [thickenings]▼(the process of making something, or becoming, thick or viscous)
noun
[UK: ˈθɪk.ən.ɪŋ] [US: ˈθɪk.ən.ɪŋ]