II.off [美 ɔf, ɑf, 英 ɒf]副off often appears as the second element of certain verb structures in English (break off, pay off, take off, etc). For translations, see the relevant verb entry (break, pay, take, etc).
I.on [美 ɑn, ɔn, 英 ɒn]介词on often appears as the second element of certain verb structures in English (count on, lay on, sign on, etc). For translations, see the relevant verb entry (count, lay, sign, etc).
It suits him perfectly to sponge off her and sometimes other people, yet he can not be bothered to lift a finger to help or to clean his own apartment.
If someone were to stereotype them all as useless losers who sponge off society on welfare, break into our homes and steal from us, there would be an outcry.