INSPISSATE

[in.spis.sate] vt -sat.ed ; -sat.ing [LL inspissatus, pp. of inspissare, fr. L in- + spissus slow, dense; akin to Gk spidnos compact, Lith spisti to form a swarm] (1626): to make thick or thicker -- in.spis.sa.tion n -- in.spis.sa.tor n