Derksen reconstructs Proto-Balto-Slavic *gurˀdus, from Proto-Indo-European *gʷr̥dus, *gʷrd-o- (“slow, heavy, tired”), see also Lithuanian gurdùs, Latvian gur̃ds (“tired”), Ancient Greek βραδύς (bradús, “slow”). The problem here is Slavic mobility with circumflex.
To ameliorate the problem, Matasović proposes to derive the word from an old compound *gʷrH-dʰh₁o, derived from Proto-Indo-European *gʷerH- (“'to express approval, praise'”) and Proto-Indo-European *dʰeh₁- (“'to do, make, put'”), with the semantic shift of 'making praises' > 'haughty, prepotent' > 'proud'. An exact parallel of the form can also be found in Proto-Celtic *bardos (“'bard'”), whence also English bard.
singular | masculine | feminine | neuter |
---|---|---|---|
nominative | *gъ̑rdъ | *gъ̑rda | *gъ̑rdo |
genitive | *gъ̑rda | *gъ̑rdy | *gъ̑rda |
dative | *gъ̑rdu | *gъ̑rdě | *gъ̑rdu |
accusative | *gъ̑rdъ | *gъ̑rdǫ | *gъ̑rdo |
instrumental | *gъ̑rdomь | *gъ̑rdojǫ | *gъ̑rdomь |
locative | *gъ̑rdě | *gъ̑rdě | *gъ̑rdě |
vocative | *gъ̑rde | *gъ̑rdo | *gъ̑rdo |
dual | masculine | feminine | neuter |
nominative | *gъ̑rda | *gъ̑rdě | *gъ̑rdě |
genitive | *gъ̑rdu | *gъ̑rdu | *gъ̑rdu |
dative | *gъ̑rdoma | *gъ̑rdama | *gъ̑rdoma |
accusative | *gъ̑rda | *gъ̑rdě | *gъ̑rdě |
instrumental | *gъ̑rdoma | *gъ̑rdama | *gъ̑rdoma |
locative | *gъ̑rdu | *gъ̑rdu | *gъ̑rdu |
vocative | *gъ̑rda | *gъ̑rdě | *gъ̑rdě |
plural | masculine | feminine | neuter |
nominative | *gъ̑rdi | *gъ̑rdy | *gъ̑rda |
genitive | *gъ̑rdъ | *gъ̑rdъ | *gъ̑rdъ |
dative | *gъ̑rdomъ | *gъ̑rdamъ | *gъ̑rdomъ |
accusative | *gъ̑rdy | *gъ̑rdy | *gъ̑rda |
instrumental | *gъ̑rdy | *gъ̑rdami | *gъ̑rdy |
locative | *gъ̑rděxъ | *gъ̑rdaxъ | *gъ̑rděxъ |
vocative | *gъ̑rdi | *gъ̑rdy | *gъ̑rda |