IPA: /ˌɪnədˈvaɪzəbl/
KK: /ɪnədˈvaɪzəbl/
Not wise or sensible; something that is not recommended to do.
It is inadvisable to travel during a storm.
Inadvisable → It is formed from "in-" (meaning not) and "advisable" (from the verb "advise", which comes from Old French *aviser*, meaning to consider or to give advice). The word "inadvisable" means not advisable or not wise to consider or follow.
Think of 'not' ('in-') being added to 'advisable', which means something that is wise to consider. This helps you remember that 'inadvisable' refers to something that is not wise to follow.