(literary) if indeed; (bound form) careless; negligent; (bound form) temporarily

not lax; not casual; careful; conscientious

not one thread loose (idiom); strictly according to the rules; meticulous; not one hair out of place

lit. not even one stroke is negligent (idiom); fig. to write characters (calligraphy) in which every stroke is placed perfectly

(lit.) to swarm like flies around rotten food and drag out an ignoble existence like a dog (idiom); (fig.) to lead an undignified life; to resort to any means for personal gain