IPA: /ɪnˈsɪpɪd/
KK: /ɪnˈsɪpɪd/
Not having much flavor or excitement; dull and uninteresting.
The soup was insipid and needed more spices to enhance its flavor.
Insipid is formed from "in-" (meaning not) and "sapidus" (from Latin, meaning flavorful or tasty). The word describes something that lacks flavor or interest, hence it is not flavorful.
Think of 'not' ('in-') having 'flavor' ('sapidus') — that's why insipid means lacking flavor or interest.