Correct spelling for the English word "more undeceivable" is [mˈɔːɹ ˌʌndɪsˈiːvəbə͡l], [mˈɔːɹ ˌʌndɪsˈiːvəbəl], [m_ˈɔː_ɹ ˌʌ_n_d_ɪ_s_ˈiː_v_ə_b_əl] (IPA phonetic alphabet).
The phrase "more undeceivable" does not have a specific etymology as it is a combination of two words: "more" and "undeceivable".
1. "More" comes from the Old English word "māra", which means "greater" or "additional". It has its roots in the Proto-Germanic language.
2. "Undeceivable" is formed by adding the prefix "un-" meaning "not" to the word "deceivable". "Deceivable" derives from the Latin word "decipere", meaning "to deceive" or "to trick".
By combining these two words, the phrase "more undeceivable" suggests an increased level of difficulty or imperviousness to being deceived or tricked.