condiment
n.a substance like salt, pepper, or vinegar that you add to food to improve its taste. It is usually used in small amounts to make a dish more interesting.
n.a substance added to food to enhance its flavour, such as salt, pepper, or vinegar. Often used in small quantities to season a dish.
“The chef served the grilled steak with a side of spicy mustard as a condiment to balance the richness.”
“While some cultures rely heavily on fermented sauces as a primary condiment, others prefer to keep their dishes simple with just a pinch of sea salt and a drizzle of olive oil.”
From late Middle English condiment, from Old French condiment, from Latin condimentum, from condīre (“to preserve, pickle, season”). See also condite and compare recondite.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.