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illegal

In a sentence
Polícia odhalila nelegálny obchod.
The police uncovered an illegal trade operation.
Nelegálny predaj zbraní vyšetrovala polícia.
The police investigated the illegal sale of weapons.
Stiahli nelegálnu kópiu softvéru z webu.
They took an illegal copy of the software offline.
Nelegálny predaj alkoholu mládeži trestajú.
Illegal alcohol sales to minors are punished.
Source
Slovak National Corpus (SNK) ↗English gloss from the frequency publish path. Hand-reviewed example sentences.
Full attribution on References.