Archaic or greatly restricted in usage by Middle Egyptian. The perfect has mostly taken over the functions of the perfective, and the subjunctive and periphrastic prospective have mostly replaced the prospective.
Declines using third-person suffix pronouns instead of adjectival endings: masculine .f/.fj, feminine .s/.sj, dual .sn/.snj, plural .sn.
Based on the forms jtm and tmw, some authors interpret the god’s name as jtmw, a noun of action derived from the verb tm(“to finish, complete”), thus literally meaning ‘the finisher’; however, the most common writings of the name only explicitly show the consonants tm.
^ Schenkel, Wolfgang (2005) “Die ägyptische Nominalbildungslehre und die Realität der hieroglyphischen Graphien der Sargtexte: Die Nominalbildungsklassen A I 5 und A I 6” in Lingua Aegyptia, volume 13, page 147