BDB2021
II. דְּרוֺר noun feminine Ps 84:4 swallow Ps 84:4 (|| צִפּוֺר), Che (q. v.) makes simile of quiet, peace, security, and supplies ellipsis; in simile, Prov 26:2 כַּצִפּוֺר לָנוּד כַּדְּרוֺר לָעוּף (of groundless curse, which does not alight, i.e. is not fulfilled).