An Etymological Dictionary of Astronomy and Astrophysics

1. To block or stop up (a passage or opening); obstruct. To prevent the passage of.
   

   2. Chem.: To entrap a substance (vapor, gas, liquid, solid) within another (by absorption).

Etymology (EN): From L. occludere “shut up, close up,” from ob “in front of, against” + claudere “to shut, close,” → include.

Etymology (PE): Barkolândan, from bar- “on; upon; against; before; at,” → object, + kolândan “to shut,” → include.