S: (n) precaution, safeguard, guard (a precautionary measure warding off impending danger or damage or injury etc.) "he put an ice pack on the injury as a precaution"; "an insurance policy is a good safeguard"; "we let our guard down"
S: (n) role (normal or customary activity of a person in a particular social setting) "what is your role on the team?"
S: (n) gender role (the overt expression of attitudes that indicate to others the degree of your maleness or femaleness) "your gender role is the public expression of your gender identity"
S: (n) position ((in team sports) the role assigned to an individual player) "what position does he play?"
Verb
S: (v) guard (to keep watch over) "there would be men guarding the horses"
S: (v) guard, ward (watch over or shield from danger or harm; protect) "guard my possessions while I'm away"
S: (v) defend, guard, hold (protect against a challenge or attack) "Hold that position behind the trees!"; "Hold the bridge against the enemy's attacks"
S: (v) guard (take precautions in order to avoid some unwanted consequence) "guard against becoming too friendly with the staff"; "guard against infection"