(adj): vs. good) -- (having undesirable or negative qualities
(adj): prenominal), dreaded, dreadful, fearful, fearsome, frightening, horrendous, horrific, terrible -- (causing fear or dread or terror
(adj): vs. unalarming) -- (frightening because of an awareness of danger
(adj): vs. nice), awful -- (offensive or even (of persons) malicious
(adj): vile; despicable
(adj): very unpleasant or offensive
(adj): characterized by malice
(adj): inspired by a feeling of fearful wonderment or reverence
(adj): vs. irreverent) -- (feeling or showing profound respect or veneration
(adj): extreme in degree or extent or amount or impact
(adj): vs. ordinary) -- (beyond what is ordinary or usual; highly unusual or exceptional or remarkable
(adj): inspiring awe or admiration or wonder
(adj): vs. unimpressive) -- (making a strong or vivid impression
(adv): used as intensifiers
I feel awful (English) = Me siento fatal (Spanish)
But fatal is the Spanish for awful.
I don't think awful can mean fatal.
Interesting that both of those Spanish words are English words too.
Horrible, fatal
Contronymic in the sense: bad, evil vs. good, uplifting, sacred.