1.
the week before last
Two weeks ago. The week that came before last week.
先々週 is formed by doubling the 先 prefix to push further into the past: 先 (previous) + 先 (previous) + 週 (week).
Related words
Common patterns
The 先々〜 pattern works for other time units too:
- 先々月: the month before last
- 一昨年/先々年: the year before last
- 一昨日: the day before yesterday
Usage
Used in everyday conversation. No special formality — equally natural in casual and polite speech.
Related Words
See also:
先週
Related:
先々月 (the month before last)
Related:
再来週 (week after next)
Related:
来週 (next week)
Related:
今週 (this week)