Tstng
testing
Strtch
stretched
Rds
arduous
Dlct
delicate
Strghtfrwrd
straightforward
Chllng
challenging
Rgrs
rigorous
strct
strict
Dmndng
demanding
Tgh
tough
Trcky
tricky
Grllng
gruelling
Wkwrd
awkward
Pnshng
punishing