BridgeDict · bridgedict.comWord4noun三加一的基数1.the cardinal number that is the sum of three and one三加一的基数ConnectionsSynonymsfourfoursomeivlittle joequadrupletquartetquaternquaternaryquaternionquaternitytetradConfusing wordsfourfoursomeivlittle joequadrupletquartetquaternquaternaryquaternionquaternityDictionary facts from ECDICT.