initial

1 initial /ɪˈnɪʃəl/ adjective
1 initial
/ɪˈnɪʃəl/
adjective
Britannica Dictionary definition of INITIAL
always used before a noun
: occurring at the beginning of something

— initially

/ɪˈnɪʃəli/ adverb
2 initial /ɪˈnɪʃəl/ noun
plural initials
2 initial
/ɪˈnɪʃəl/
noun
plural initials
Britannica Dictionary definition of INITIAL
1 
[count] : a first letter of a name
2 
initials [plural] : the first letters of each of a person's names
3 initial /ɪˈnɪʃəl/ verb
initials US initialed or British initialled US initialing or British initialling
3 initial
/ɪˈnɪʃəl/
verb
initials US initialed or British initialled US initialing or British initialling
Britannica Dictionary definition of INITIAL
[+ object]
: to mark (something) with your initials