irreplaceable

“Public education is irreplaceable,” he said, citing its commitment to serve every child regardless of their background or circumstance.

Several items, described as "irreplaceable" by the boss of the museum, were stolen from a display case and are yet to be found.

“As we all know, Neil was irreplaceable,” Lee said in the band’s statement.

"I am absolutely clear that no one is irreplaceable," was another pithy expression.

"If you're not living the values, it is clear you leave the BBC or there are consequences," he told MPs on Tuesday, adding that no one was "irreplaceable".