NATURAL a. 18 definitions
revealed religion. See Quotation under Natural, a., 3. -- Natural vowel, the vowel sound heard in urn, furl, sir, her, etc.; -- so called as being uttered in the easiest open position of the mouth organs. See Neutral vowel, under Neutral and Guide to Pronunciation, § 17.
O n. 7 definitions
cipal of which are its long sound, as in bone, its short sound, as in nod, and the sounds heard in the words orb, son, do (feod), and wolf (book). In connection with the other vowels it forms several digraphs and diphthongs. See Guide to Pronunciation, §§ 107-129.
OBDURATE a. 3 definitions
Hardened in feelings, esp. against moral or mollifying influences; unyielding; hard-hearted; stubbornly wicked. The very custom of evil makes the heart obdurate against whatsoever instructions to the contrary. Hooker. Art thou obdurate, flinty, hard as steel, Nay, more than flint, for stone at rain relenteth Shak.…