#1 hunker down v. sit on one's heels; "In some cultures, the women give birth while squatting"; "The children hunkered down to protect themselves from the sandstorm". wn
#2 hunker down v. take shelter; "During the sandstorm, they hunkered down in a small hut". wn
#3 hunker down v. hold stubbornly to a position; "The wife hunkered down and the husband's resistance began to break down". wn
vizzz