Grave, pensativo, sério.
a.Grave in manner or disposition; earnest; thoughtful; solemn; not light, gay, or volatile.
Really intending what is said; being in earnest; not jesting or deceiving.
Important; weighty; not trifling; grave.
Hence, giving rise to apprehension; attended with danger; as, a serious injury
earnest similar term, sincere similar term, solemn similar term, grave similar term, sedate similar term, sober similar term, solemn similar term, overserious similar term, real similar term, thoughtful similar term, serious-minded similar term, sobering similar term, solid similar term, frivolous antonym adj, important similar term, of import similar term adj, dangerous, grave, grievous, severe, life-threatening, critical similar term adj, good, intellectual similar term adj, unplayful, sober, playful antonym adj, difficult similar term, hard similar term
Vogais: eiou
Consoantes: srs
serai, serie, serow, sari, sear, seer, sere, serr, sori, sour.