operose

adjective3

1. •
   (no longer used) Made with or requiring a lot of labour; painstaking, laborious.

   • Povver and riches appear then to be, vvhat they are, enormous and operose machines contrived to produce a fevv trifling conveniencies to the body, […] — 1759
2. •
   (no longer used) Tedious, wearisome.
3. •
   (no longer used) Of a person: busy, industrious, or painstaking.