Correct spelling for the English word "SQ INMIN" is [ˌɛskjˈuː ˈɪnmɪn], [ˌɛskjˈuː ˈɪnmɪn], [ˌɛ_s_k_j_ˈuː ˈɪ_n_m_ɪ_n] (IPA phonetic alphabet).
The term "SQ INMIN" does not have any widely recognized etymology as it appears to be a combination of seemingly random letters. It does not correspond to any known word or phrase in the English language or in other languages. It is possible that "SQ INMIN" could be an acronym or abbreviation specific to a particular domain or context, but without further information or context, its meaning and origin remain unclear.