the.com/rigorous
Thoroughness with a spine — checking the work so reality cannot embarrass you later.
means Extremely careful, exact, and demanding, leaving no detail unchecked or assumption unexamined.
from From Latin rigor, stiffness or hardness, from rigere, to be stiff — the same root that gives us rigor mortis, where the body stops cutting corners entirely.
Cold cousinRigor also means a chill or shivering fit.
Legal senseRigor of the law means strict, merciless enforcement.
Stiff originOnce described physical hardness before mental thoroughness.