initial (suomeksi)

alku- (a: vaiheen / Chronologically first, early; of or pertaining to the beginning)
alkukirjain (s: first letter of a word)
anfangi (s: typografia / calligraphy: distinguished initial letter)
alkuperäinen (a: Chronologically first, early; of or pertaining to the beginning)
varhainen (a: Chronologically first, early; of or pertaining to the beginning)
esi- (a: Chronologically first, early; of or pertaining to the beginning)
alustava (a: Chronologically first, early; of or pertaining to the beginning)
ensimmäinen (a: Spatially first, placed at the beginning, in the first position)
nimikirjaimet (s: first letters of a person's name as a unit)
vahvistaa nimikirjaimilla (v: to sign one's initial(s))
parafoida (v: to sign one's initial(s))