thick, viscous material often found in waste

sediment or accumulated deposits in a liquid

अवशिष्ट

English Usage: The sludge at the bottom of the tank needed to be removed.

Hindi Usage: टैंक के नीचे का अवशिष्ट हटाना था।

a substance capable of turning blue litmus paper red

a sharp taste or smell

तीखापन

English Usage: The lemon juice has an acid flavor that enhances the dish.

Hindi Usage: नींबू का रस डिश का तीखापन बढ़ाता है।