To approach slowly or gradually, often with stealth.

To increase or advance in an unnoticed or subtle manner.

अप्रत्यक्ष या सूक्ष्म तरीके से बढ़ना।

English Usage: As the deadline approached, the stress levels started to creep up.

Hindi Usage: जैसे-जैसे समय पार होता गया, तनाव के स्तर धीरे-धीरे बढ़ने लगे।