Borrowed from Polish Czech, from Czech Čech.
enPR: chĕk, IPA(key):
Audio (US) (file)
Homophones: check, cheque
Czech (not comparable)
Of, from, or pertaining to the Czech Republic, the Czech people, culture, or language.
2012 June 28, Jamie Jackson, “Wimbledon 2012: Lukas Rosol shocked by miracle win over Rafael Nadal”, in the Guardian:
A big beast of the men's field was put through the mangle then dumped out of Wimbledon as Rafael Nadal fell at around 10.06pm to Lukas Rosol, a Czech debutant who will never forget this Thursday evening in south-west London.