failingly

noun

1. an act or instance of failing; failure: His failing is due to general incompetence.
2. a defect or fault; shortcoming; weakness: His lack of knowledge is a grave failing.

preposition

3. in the absence or default of: Failing payment, we shall sue.

noun

1. a weak point; flaw

preposition

2. (used to express a condition) in default offailing a solution this afternoon, the problem will have to wait until Monday

n.

“defect, fault,” 1580s, verbal noun from fail (v.).