1)
What is "Yachsoch Nafsho Mini Shachas"?
1.
Malbim: He withholds his spiritual Nefesh from destruction, i.e. saves it from punishment.
2)
What is "Chayaso"?
1.
Ibn Ezra: The Nefesh Chayah.
3)
What is the meaning of "v'Chayaso me'Avor ba'Shalach"?
1.
Rashi: The afflictions benefit him. They spare his Nefesh from the weapon and sword of the angel of death. Shalach is a weapon - "Yado... v'Achas Machazekes ha'Shalach" (Ibn Ezra - and "v'Ein Mishlachas ba'Milchamah.")
2.
Malbim: He saves him from bodily death.
