Polish twardy

← Proto-Slavic *tvьrdъ (inherited)

→ English quartz (cognate)

→ Danish kvarts (cognate)

→ German Quarz (cognate)

→ Lithuanian tvirtas (cognate)

→ Polish kwarc (cognate)

→ Polish twierdzić (mention)

→ Polish twardo (affix)

→ Polish Twardy (mention)

→ Polish twardość (affix)

→ Polish utwardzić (affix)

→ Polish twardziel (affix)

→ Polish twardogłowy (affix)

→ Polish Twardoch (mention)

→ Polish Twarduś (mention)

→ Polish Twardziak (suffix)

→ Polish Twardzik (suffix)

→ Polish twardzina (affix)

→ Polish twardzica (affix)

→ Polish twardawy (affix)