напряжённый
From LSJ
κατὰ τὸν δεύτερον, φασί, πλοῦν τὰ ἐλάχιστα ληπτέον τῶν κακῶν → we must as second best, as people say, take the least of the evils
γυιοβαρής, δυσπέρατος, δυστράπελος, δυσχερής, ἔγκοπος, ἔμμοχθος, ἐπίπονος, καματηρός, κοπιαρός, κοπιώδης, κοπώδης, περισκελής, πραγματώδης, χαλεπός