Arduous

"Arduous" in bg

мъчен

mǎčen

(needing or using up much energy)

недостъпен

nedostǎpen

(hard to climb or traverse)

стръмен

strǎmen

(hard to climb or traverse)

труден

truden

(needing or using up much energy)

усилен

usilen

(needing or using up much energy)

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Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.