eklig
disgusting
Something that causes a strong feeling of disgust, revulsion, or nausea, for example because of its appearance, smell, or taste.
Ich finde Spinnen total eklig.
I find spiders totally disgusting.

disgusting / nasty
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disgusting
Something that causes a strong feeling of disgust, revulsion, or nausea, for example because of its appearance, smell, or taste.
Ich finde Spinnen total eklig.
I find spiders totally disgusting.

'Eklig' (disgusting) is the adjective related to the noun 'der Ekel' (disgust), which means 'Abscheu' (revulsion) or 'Widerwille' (aversion). Something 'Ekliges' (disgusting) therefore causes disgust.
Der Geruch in dem Zimmer war einfach nur eklig.
The smell in the room was simply disgusting.
The meaning depends strongly on the context. If the word refers to senses such as taste, smell, or sight, it means 'widerlich' (disgusting). If it refers to people's behavior, it means 'gemein' (mean) or 'unangenehm' (unpleasant).
Diese alte Milch schmeckt eklig.
This old milk tastes disgusting.
Using 'eklig' (nasty) to describe unfair or mean behavior is typical of colloquial language.
Das war eine eklige Lüge, um sich einen Vorteil zu verschaffen.
That was a nasty lie to gain an advantage.
delicious
'lecker' and 'eklig' are almost opposites when talking about food. You use 'lecker' for foods or drinks that taste good. You use 'eklig' when something causes disgust or nausea, for example because of its taste, smell, or appearance. 'eklig' is more strongly negative than simply 'not delicious'. So something can fail to taste especially good without being disgusting right away. 'lecker' fits a pleasant taste, while 'eklig' is for something you would rather not eat, smell, or touch.

Die Milch riecht eklig, deshalb schütte ich sie weg.
The milk smells disgusting, so I pour it away.
Auf dem Markt kauft Max frisches Brot, weil es dort so lecker ist.
At the market, Max buys fresh bread because it is so delicious there.