The Swedish term "ihärdig, skötsam, flitig" matches the English term "diligent"

other swedish words that include "ihärdig" : english :
ihärdig assiduous
ihärdig, trägen persevering
other swedish words that include "skötsam" : english :
skötsam, hyfsad well-behaved
other swedish words that include "flitig" : english :
flitig, idog industrious
flitig studious