Arbitrary (adjective) بے قاعدہ، خودمختار،من مانا

based on random choice or personal whim, rather than any reason or system.
Example: “an arbitrary decision”
Stringent (adjective) سخت، شدید، تاکیدی

(of regulations, requirements, or conditions) strict, precise, and exacting.
Example: “stringent guidelines on air pollution”