甫
ホ, フ, はじ.めて, はじめ, とし, なみ, すけ, よし

for the first time, not until

JLPT1 G13 S0 F2270

The relevant oracle bone form of this character shows a seedling curving upward in spreading from a field or seedbed → *broad/wide*; *great*. Also, *beginning* (← beginning of a plant's life cycle) → *for the first time*. (*Suffix for male names*) is a borrowed meaning.

[Full Kanji Etymology List]