• 世紀せいき — century
• 紀行きこう — travel journal
• 紀元きげん — era origin
• 紀律きりつ — discipline
• 風紀ふうき — public morals

This character combines the radical 糸 (“thread”) with the phonetic element 己 (キ), which can mean “self” or “origin.” In early usage, it referred to weaving a thread of history — a figurative extension meaning to “chronicle” or “record.”

紀行きこうを 出版しゅっぱんしました。
I published a travel journal.

これは 一世紀いっせいきまえの 記録きろくです。
This is a record from a century ago.