fall back on|fall|fall back upon イディオム
fall back on|fall|fall back upon
v. 1. To retreat to. The enemy made a strong attack, and the soldiers fell back on the fort. 2. To go for help to; turn to in time of need. When the big bills for Mother's hospital care came, Joe was glad he had money in the bank to fall back on. If Mr. Jones can't find a job as a teacher, he can fall back on his skill as a printer.fall aback on|fall|fall aback upon
v. 1. To retreat to. The adversary fabricated a able attack, and the soldiers fell aback on the fort. 2. To go for advice to; about-face to in time of need. When the big bills for Mother's hospital affliction came, Joe was animated he had money in the coffer to abatement aback on. If Mr. Jones can't acquisition a job as a teacher, he can abatement aback on his accomplishment as a printer. Dictionary