IPA: /ˈtaɪərdɪst/
KK: /ˈtaɪərdɪst/
Feeling a strong need to rest or sleep; exhausted.
After a long day at work, she felt the tiredest she had ever been.
Comparative: more tired
Superlative: tiredest
Tiredest → It is formed from "tired" (from Old English "tīred", meaning exhausted or weary) and the suffix "-est" (used to form the superlative degree). The word "tiredest" means the most exhausted or weary among a group.
Think of feeling the most 'exhausted' ('tired') when compared to others — that's what 'tiredest' means.
No commonly confused words.