open-end

o.pen-end

adj.（形容词）
Having no definite limit of duration or amount:
期限不固定的：在期限或数量上没有明确限制的：
例句：
an open-end contract.
追加合同

Permitting the borrowing of additional funds under existing terms:
允许在原契约基础上追加的：
例句：
an open-end mortgage.
一种开放式抵押