rigorous
RIG-er-usadjMeaning extremely thorough and careful
Memory hook check the RIG, ALL of US. Before the sailboat race, all of us check every rope and knot of the rig, then check them again. An inspection that careful is rigorous.
After a rigorous search of the house, Mom found the missing key inside the cereal box.
In context The bridge opened only after rigorous testing: loaded trucks rolled across it for a week, and engineers checked every bolt and every weld twice.
Similar thorough, meticulous, strict, demanding
Opposite sloppy, careless, lax
From Latin rigor, “stiffness, hardness,” from rigere (to be stiff).