IPA: //ˈprɛzəntˌsɛndɪŋ//
KK: /ˈprɛzəntˌsɛndɪŋ/
Happening or existing before a legal sentence is given.
The judge considered the presentencing report before making a decision.
Presentencing → It is formed from "pre-" (meaning before) and "sentence" (from Latin "sententia", meaning opinion or judgment) and the suffix "-ing" (indicating the action of). The term refers to the action of determining a sentence before the actual sentencing occurs.
Think of the action that happens 'before' ('pre-') a 'judgment' ('sentence') is made — that's what presentencing means.
No commonly confused words.