guarded

(verb) to keep watch over. Synonyms: guard. Example: "There would be men guarding the horses."

(verb) watch over or shield from danger or harm; protect. Synonyms: guard, ward. Example: "Guard my possessions while i'm away."

(verb) protect against a challenge or attack. Synonyms: defend, guard, hold. Examples: "Hold that position behind the trees!." "Hold the bridge against the enemy's attacks."

(verb) take precautions in order to avoid some unwanted consequence. Synonyms: guard. Examples: "Guard against becoming too friendly with the staff." "Guard against infection."

(adj) prudent. Synonyms: restrained. Example: "Guarded optimism."