rigorous

英['rɪg(ə)rəs] 美['rɪɡərəs]

1. rigidly accurate; allowing no deviation from a standard;

"rigorous application of the law"

"a strict vegetarian"

2. demanding strict attention to rules and procedures;

"rigorous discipline"

"tight security"

"stringent safety measures"

3. used of circumstances (especially weather) that cause suffering;

"brutal weather"

"northern winters can be cruel"

"a cruel world"

"a harsh climate"

"a rigorous climate"

"unkind winters"