2. strength; power, energy vigor, force; main force, physical force, brute force; spring, elasticity, tone, tension, tonicity.

stoutness ; lustihood, stamina, nerve, muscle, sinew, thews and sinews, physique; pith, pithiness; virtility, vitality.

athletics, athleticism; gymnastics, feats of strength.

adamant, steel, iron, oak, heart of oak; iron grip; grit, bone.

3. (Verb). be strong,be stronger; overmatch.

render strong, give strength; strengthen, invigorate, brace, nerve, fortify, sustain, harden, case harden, steel, gird; screw up, wind up, set up; gird up one’s loins, brace up one’s loins; recruit, set on one’s legs; vivify; refresh ; refect; reinforce, reenforce(restore)

Here is a sentence…

In J. R. R. Tolkien’s The Lord of the Rings it is said in the second verse of Bilbo’s Song of Eärendil, regarding the appearance of Eärendil; “Of adamant his helmet tall”. Additionally, at the crowning of King Elessar, it is said that his crown “was adorned with jewels of adamant”.

synonym = obstinate

hope this helps

Impervious to pleas, appeals, or reason; stubbornly unyielding. Synonyms = inflexible.

The previously submitted sentances will work.

only kidding

how about

” i know i am correct in fact i am adamant that i am ”

all the best

Ian