The spelling of the word "hath whack" may seem confusing, but it can be explained using IPA phonetic transcription. The "hath" portion is pronounced /hæθ/, with the "th" sound being made by placing the tongue between the upper and lower teeth. The "whack" portion is pronounced /wæk/, with the "w" sound being made by rounding the lips and the "ck" sound pronounced as a hard "k" followed by a short "uh" sound. So, "hath whack" is pronounced /hæθ wæk/.