The spelling of the word "groundwall" can be explained using the International Phonetic Alphabet (IPA). The first syllable is pronounced /graʊnd/, with the vowel sound of "ow" as in "cow". The second syllable is pronounced /wɔl/, with a short "o" sound and a soft "L". The word refers to a type of construction, where the foundation or base of a structure is made by digging down into the ground. The spelling of this word may be confusing due to the use of two consecutive consonants, "nd" and "w".