The word(s) "worthless" appears 3 time(s) in 3 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) To orphans restore their property (When they reach their age), nor substitute (your) worthless things for (their) good ones; and devour not their substance (by mixing it up) with your own. For this is indeed a great sin.

(2) They will say: "Glory to Thee! not meet was it for us that we should take for protectors others besides Thee: But Thou didst bestow, on them and their fathers, good things (in life), until they forgot the Message: for they were a people (worthless and) lost."

(3) When thou lookest at them, their exteriors please thee; and when they speak, thou listenest to their words. They are as (worthless as hollow) pieces of timber propped up, (unable to stand on their own). They think that every cry is against them. They are the enemies; so beware of them. The curse of Allah be on them! How are they deluded (away from the Truth)!