laxness

noun

quality of being (physically) lax

Wiktionary

noun

Etymology: Etymology tree English lax Proto-Germanic *-inōną Proto-Indo-European *-dyé- Proto-Germanic *-atjaną Proto-Indo-European *-tus Proto-Germanic *-þuz Proto-Germanic *-assuz Proto-Germanic *-inassuz Proto-West Germanic *-nassī Old English -nes Middle English -nesse English -ness English laxness From lax + -ness.

The property of being lax, lacking strictness.
“There was a certain laxness in safety preparations that made the fire worse.”