1) Defensive 2) Precautional 3) Preventative 1) Precautional 2) Preventative 3) Preventive 
• (a.) Of or pertaining to precaution, or precautions; as, precautionary signals.
Pre·cau'tion·a·ry adjective Of or pertaining to precaution, or precautions; as, precautionary signals. 
[adj] - taken in advance to protect against possible danger or failure
precautionary 1. The foresight to protect against possible harm or trouble or to limit damage if something goes wrong. 2. An action taken in advance to protect against possible danger, failure, or injury; a safeguard.
precautional adjective taken in advance to protect against possible danger or failure; `gave precautionary advice`; `I would take precautionary steps to keep him away`
of, pertaining to, or characterized by precaution: precautionary measures. · expressing or advising precaution: precautionary warnings against possible tornadoes.