Correct spelling for the English word "hardliest" is [hˈɑːdliəst], [hˈɑːdliəst], [h_ˈɑː_d_l_i__ə_s_t] (IPA phonetic alphabet).
There is no recognized term or word in the English language known as "hardliest". It appears to be a neologism or a made-up word, as it does not exist in any dictionary or have any established meaning.
However, based on its construction, one could speculate on its potential meaning. The suffix "-liest" is often used to form the superlative degree of adjectives in English, indicating the highest degree or most extreme quality. For example, "loveliest" is the superlative form of "lovely," meaning the most beautiful or the most pleasing.
Therefore, if "hardliest" were a legitimate term, it would likely be used to describe the highest or most extreme degree of hardness. For instance, it could be used to describe an object or material that is incredibly tough, rigid, or resistant to deformation. However, it is important to note that this is purely speculative and hypothetical, as "hardliest" does not have an established meaning.
In summary, while "hardliest" does not exist in the English language, its theoretical meaning could pertain to an object or material exhibiting the highest level of hardness or strength, if the word were to be assigned such a definition.