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Related to summon up: stave off, bring down, follow suit, get through, begs to differ, availing
summon something up
to call forth particular qualities, such as strength, courage, wisdom, etc. She summoned her courage up and went into the room. Liz summoned up all her courage.
To call something forth; evoke something: I summoned up my courage and dove into the deep water. At first I couldn't remember the telephone number, but I summoned it up by concentrating very hard.