out-fast
/ˌaʊtˈfɑːst/ /ˌaʊtˈfast/verb
[with object] To outdo in fasting, to fast longer than.
- †to out-fast oneself: to fast beyond one's power of endurance..
Origin
Mid 17th century; earliest use found in Gervase Markham (?1568–1637), author. From out- + fast.