Kopcích
Kopcích is the locative plural form of the Czech noun kopec, meaning hill. In Czech, kopcích is used to express location on or among hills, and it is not a standalone noun but a grammatical inflection.
Formation and usage: The base kopec becomes kopcích in the locative plural. This form follows locative-case
Examples: Město leží na kopcích. Na kopcích se nachází několik vesnic. O kopcích se vypráví v regionálních
Pronunciation and notes: Kopcích is pronounced roughly as kop-tsikh, with the stress on the first syllable.