Two words
May be 2 words combined (ob+durus) If not obvious, probably incorrect
dur.us ADJ 1 1 NOM S M POS
durus, dura -um, durior -or -us, durissimus -a -um ADJ [XXXAX]
hard, stern; harsh, rough, vigorous; cruel, unfeeling, inflexible; durable;
ob PREP ACC
ob PREP ACC [XXXAX]
on account of, for the sake of, for; instead of; right before;
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Credits:
This, our local install of the popular standby Whitaker's Words, is possible thanks to the resurrection of the venerable project at William Whitaker's Words, where you will also find extensive documentation. The corresponding GitHub repository is where you can submit issues about missing forms and analyses.
This web interface by Walter M. Shandruk.