alienate — If you alienate someone, you make them become unfriendly or unsympathetic towards you.
plagioclase — any of the feldspar minerals varying in composition from acidic albite, NaAlSi 3 O 8 , to basic anorthite, CaAl 2 Si 2 O 8 , found in most igneous rocks: shows twinning striations on good cleavage surfaces.
