defensible
adj.able to be explained or justified in a way that makes sense. You use this to describe an idea or action that is not obviously wrong or silly.
adj.capable of being justified or explained in a way that is reasonable or logical. Often used to describe positions, arguments, or actions that withstand critical scrutiny.
“The manager's decision to raise prices is not very defensible.”
“The lawyer argued that the client's actions were defensible under the specific circumstances of the case.”
“While the initial strategy seemed flawed, the team eventually provided enough data to make their approach defensible in the face of external criticism.”
“A California resident explains how he hardened his home against wildfires and created defensible space.”
From Old French defensable, from Latin defensibilem. Equivalent to defense + -ible.
Etymology adapted from Wiktionary, available under CC BY-SA 4.0.