serious englannista kaikille kielille - Sanakirja.org (englanti-*)

Kieli	Käännökset
bulgaria	сериозен (seriózen), тежък (téžǎk)
espanja	serio, grave, pesado
esperanto	grava, serioza
hollanti	serieus, ernstig, erg, danig
italia	grave, serio
japani	本気 (honki), 真剣 (shinken), 真面目 (majime / shinmenmoku), 真面目な (majimena), 真剣な, まじめ (majime), 本気な, 深刻な (しんこくな, shinkoku na), 多大な, 甚大な (jindaina), たいへんな (taihenna), まじな (majina), かたい (katai), 四角四面な (shikakushimenna), 硬い (katai), 大変な, 本式な (honshikina), 険悪な, あつい (atsui), 危ない (abunai), あぶない (abunai), 危うい, あやうい (ayaui), 堅い (katai), 偉い (erai)
kreikka	σοβαρός (sovarós)
latina	gravis, sevērus, sēriosus, sevērior, sērius, intentus
latvia	svarīgs, nopietns, smags
norja	alvorlig, seriøs, stygg
portugali	sério, grave
puola	poważny
ranska	sérieux, sérieuse, grave, moyen
ruotsi	allvarlig, allvarsam, seriös, svår, grov
saksa	ernst, schwerwiegend, ernsthaft, bedenklich, ernstzunehmend, gravierend, schwer, seriös
suomi	vakava, totinen, uhkaava, vakavasti otettava, vakavamielinen, tärkeä, vaikea, tosi, paha
tanska	alvorlig, højtidelig, værre
turkki	ciddi
tšekki	vážný
unkari	komoly, súlyos
venäjä	серьёзный (serjoznyi), тяжёлый (tjažolyi)
viro	ränk

Without humor or expression of happiness; grave in manner or disposition.
Important; weighty; not insignificant.
Really intending what is said (or planned, etc); in earnest; not jocular or deceiving.
(of a relationship) Committed.

(colloquial or dialect) seriously, in a serious manner (most often heard in take or mean serious)

It was a surprise to see the captain, who had always seemed so serious, laugh so heartily.
This is a serious problem. We'll need our best experts.
After all these years, we're finally getting serious attention.
a serious threat, vakava uhka
cause serious damage, aiheuttaa pahoja vaurioita
be serious, olla tosissaan

Sanakirja.org