nenasycená

Nenasycené is a Czech adjective used in several contexts to denote not being saturated or not being satisfied. It can describe chemical substances as well as figurative uses related to appetite, desire, or demand.

In chemistry, nenasycené refers to compounds that do not contain the maximum possible number of hydrogen atoms, typically due to the presence of one or more double or triple bonds between atoms. This category includes nenasycené tuky (unsaturated fats) and nenasycené mastné kyseliny (unsaturated fatty acids). Such substances are usually more reactive in addition reactions and tend to have lower melting points, often being liquids at room temperature. They are classified as mononenasycené (monounsaturated) or polynenasycené (polyunsaturated). The geometry around double bonds (cis or trans) is a common feature, with trans fats viewed as less healthy in excess.

In nutrition, nenasycené tuky are emphasized for potential cardiovascular benefits when they replace saturated fats in the diet. Typical sources include vegetable oils (for example olive, canola, sunflower), nuts, seeds, and fatty fish. Essential fatty acids, such as linoleic acid (an omega-6) and alpha-linolenic acid (an omega-3), are types of nenasycené fats that the body cannot synthesize and must obtain from the diet.

In other uses, nenasycené can describe insatiability in appetite or desires, meaning unquenched or never satisfied. For example, nenasycený hlad refers to an unending hunger, while nenasycené touhy describes unfulfilled desires.

Etymology: from ne- (not) + nasytit (to satiate), with forms adapting to gender and number. See also saturated fat, trans fat, unsaturated fats, essential fatty acids.