Sore and tired
anaemic, debilitated, delicate, exhausted, faint, feeble, fragile, frail, infirm, puny, shaky, sickly, spent, tender, unsteady, wasted, cowardly, impotent, indecisive, ineffectual, infirm, irresolute, pathetic, powerless, soft, spineless, hollow, lame, shallow, defenceless, vulnerable, tasteless, thin, watery.
a or an
you can use or , otherwise, or rather than.
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Like
hard
Forefather?
peter
spectacular
athletics
demonstrate, employ, illuminate,
You can use: manage and succeed.
Lumber or timber.