Preventing, hindering, or acting as an obstacle to. / Carried out to deter military aggression. / Slowing the development of an illness; prophylactic. / (obsolete) Going before; preceding.

(dated) A thing that prevents, hinders, or acts as an obstacle to. / (nonstandard) A thing that slows the development of an illness. / A contraceptive, especially a condom.

In a preventive way

plural of preventive

The quality of being preventive.

(uncountable) The condition of being preventable / (countable) The extent to which something is preventable

In a manner that is preventative.

present participle and gerund of prevent

The act of preventing or hindering; obstruction of action, access, or approach; thwarting.

(transitive) To stop (an outcome); to keep from (doing something). / (intransitive, now rare) To take preventative measures. / (obsolete, transitive) To come before; to precede.