D defs.my
Entry 2 senses Webster, 1913

Expound

/(ĕks*pound")/ · Ex·pound · IPA /ɪkˈspaʊnd/
01 v. t. To lay open; to expose to view; to examine.
imp. & p. p. Expounded; p. pr. & vb. n. Expounding
  1. 1.
    To lay open; to expose to view; to examine.[Obs.]
    “He expounded both his pockets.” — Hudibras.
  2. 2.
    To lay open the meaning of; to explain; to clear of obscurity; to interpret; as, to expound a text of Scripture, a law, a word, a meaning, or a riddle.
    Expound this matter more fully to me.” Bunyan.