IPA: /səˈfʌkəˌteɪɪŋli/
KK: /sʌfəkɛɪtɪŋli/
In a way that makes it hard to breathe or feel comfortable, often causing a feeling of being overwhelmed or trapped.
The heat in the room was suffocatingly intense, making it difficult to concentrate.
Suffocatingly → It is formed from "suffocare" (from Latin, meaning to choke or stifle) and the adverbial suffix "-ly" (meaning in a manner of). The word "suffocatingly" describes something that causes a choking or stifling sensation in a manner.
Think of the Latin word "suffocare" which means to choke, and remember that "suffocatingly" describes something that feels like it is choking you.
No commonly confused words.