2 words for FF 1–2 letters

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1 letter (1)

f
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Alphabet (Z–A)
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2 letters (1)

ff
Archaic object pronoun
?
T
?
H
?
E
?
E
Hint 1 meaning
The objective case of thou. See Thou.
Hint 2 anagram
ETEH
Hint 3 another clue
BEING USED OR WORKED FOR THE FIRST TIME
17 +1