firm, durable quick 5 realizations
ACCEPTED Realization 1
type Cognates
language 1 Old East Slavic
language 2 Bulgarian
lexeme 1 чьрствыи
lexeme 2 червъст (čevrăst)
meaning 1 hard
direction
meaning 2 one who is quick, nimble in work or in movements
reference RNBE Sreznevskij: 3, 1567-1568
comment
ACCEPTED Realization 2
type Semantic evolution
language 1 Old English
language 2 English
lexeme 1 fæst
lexeme 2 fast
meaning 1 firm, stable
direction
meaning 2 quick, fast
reference Dictionary of synonims. Buck: 986 Bosworth, Toller: 267
comment

The development of “rapid” apparently happened first in the adverb and then transferred to the adjective; compare hard in expressions like “to run hard”. The original sense of “secure, firm” is now slightly archaic, but retained in the related fasten (“make secure”).

ACCEPTED Realization 3
type Cognates
language Russian
lexeme жёсткий (žëstkij)
meaning 1 hard, harsh
direction
meaning 2 (dialect) quick, nimble
reference SRNG: 9, 146
comment The second meaning is dialectal (Western, Kursk )
SUSPENDED Realization 4
type Cognates
language 1 Russian
language 2 Czech
lexeme 1 крепкий (krepkij)
lexeme 2 křepký
meaning 1 strong, solid
direction
meaning 2 brisk, nimble
reference SSJČ
comment Cf. Also ЭССЯ 12: 135-138
ACCEPTED Realization 5
type Cognates
language 1 Slovenian
language 2 Czech
lexeme 1 dréčen
lexeme 2 dričné
meaning 1 corpulent, stout
meaning 2 quick, nimble
reference
comment The Czech word is dialectal