1.
clue, lead, starting point
A hint or starting point that helps in solving a problem, understanding something, or beginning an endeavor.
Etymology
糸 (thread) + 口 (mouth/opening) - literally 'the end of a thread' that you find to unravel something.
Common patterns
- 糸口を見つける (to find a clue)
- 糸口を探す (to search for a lead)
- 糸口をつかむ (to grasp a lead)
- 糸口になる (to become a starting point)
Similar words
- 手がかり: clue, lead
- きっかけ: trigger, opportunity
- 端緒: beginning, clue (more formal)