сгъстявам се означава в английски

compress [compressed, compressing, compresses]▼(to be pressed together)
verb
[UK: kəm.ˈpres] [US: ˈkɑːm.pres]

congeal [congealed, congealing, congeals]▼(to become congealed, solidify)
verb
[UK: kən.ˈdʒiːl] [US: kən.ˈdʒiːl]

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