1‘his diet is deficient in vitamin A’
lacking, wanting, defective, inadequate, insufficient, limited, poor, scant
short of, short on, low on, with an insufficiency of, with too few ..., with too little ...
informal strapped for, pushed for
2‘on all levels, this is deficient leadership’
defective, faulty, flawed, inadequate, imperfect, impaired, shoddy, scrappy, sketchy, weak, inferior, unsound, substandard, second-rate, poor, shabby, incomplete, leaving much to be desired
We take a look at several popular, though confusing, punctuation marks.