IPA: /ˌɒb.səˈlɛs.ənt/
KK: /ˌɑb səˈlɛs ənt/
Describing something that is becoming outdated or no longer useful.
Many technologies are obsolescent due to rapid advancements in the field.
Obsolescent is formed from "obsolescere" (meaning to fall into disuse) and the suffix "-ent" (indicating a state or condition). The word describes something that is in the process of becoming obsolete or falling out of use.
Think of something that is 'falling into disuse' — that's what obsolescent means.
No commonly confused words.