a brief or momentary sensation of discomfort

अस्थायी दर्द

English Usage: After the accident, she experienced fleeting pain in her leg.

Hindi Usage: दुर्घटना के बाद, उसे अपनी टांग में अस्थायी दर्द का अनुभव हुआ।

lasting for a very short time

क्षणिक

English Usage: Their fleeting moments of happiness were cherished.

Hindi Usage: उनके क्षणिक खुशी के पल संजोए गए।