Early 17th century; earliest use found in The Holie Bible faithfully translated into English. Apparently a variant of quagmire, although compare discussion at that entry.
Definition of quadmire in US English:
quadmire
nounˈkwɒdmʌɪə
rare
Quagmire.
Origin
Early 17th century; earliest use found in The Holie Bible faithfully translated into English. Apparently a variant of quagmire, although compare discussion at that entry.