distend

Etymology

verb

1. (intransitive) To extend or expand, as from internal pressure; to swell
   Then came the arrowy flight and form of the hurricane itself—its actual bulk—its imbodied power, pressing along through the forest in a gyratory progress, not fifty yards wide, never distending in width, yet capriciously winding from right to left and left to right. 1835, William Gilmore Simms, The Partisan, Harper, Chapter XIV, page 180
2. (transitive, reflexive, archaic) To extend; to stretch out; to spread out.
   I begin to hate the theater, the feeling wickedly distended by histrionics, all my old gestures, clutchings, tears, and applications. These impure and frail matters are conteined within the angust concave of the Lunar Orb, above which with uninterrupted Series the things Celestial distend themselves. 1662 Thomas Salusbury, Galileo's Dialogue Concerning the Two Chief World Systems (Dialogue 2)
3. (transitive) To cause to swell.
4. (biology) To cause gravidity.