The spelling of the word "profounding" is not commonly used in English. However, the word "profound" is often used, which is pronounced as /prəˈfaʊnd/. The sound "pr" in "profound" is pronounced as /pr/. The "o" is pronounced as /əʊ/, and the "u" is pronounced as /ʌ/. The "n" sound is pronounced as /n/, and the ending "-ing" is pronounced as /ɪŋ/. Therefore, the IPA phonetic transcription spelling for "profounding" would be /prəˈfaʊndɪŋ/.