IPA: //prɪˈsɛptɪv//
KK: /prɪˈsɛptɪv/
Relating to rules or principles that guide behavior or actions; instructive in nature.
The teacher's preceptive approach helped students understand the importance of ethics.
Preceptive is formed from "pre-" (meaning before) and "cept" (from Latin "capere", meaning to seize or take). The word refers to the ability to seize or understand something before it happens or is fully explained.
Think of 'seizing' ('cept') knowledge 'before' ('pre-') it is fully presented — that's what preceptive means.