SOLDER
| Date | Clue |
|---|---|
| 2026-08-30 | Join, as two metal surfaces |
| 2024-03-16 | Metalworker's union |
| 2021-07-16 | Do some bonding |
| 2019-10-03 | Lead-tin alloy |
| 2017-10-02 | Electrician's alloy |
| 2013-03-13 | Unite, in a way |
| 2012-03-29 | Electrician's alloy |
| 2010-07-20 | Electrician's alloy |
| 2009-03-24 | Electrician's alloy |
| 2009-02-11 | Joining alloy |
| 2000-12-12 | Electrician's alloy |
| 1998-09-16 | Lead-tin alloy |
| 1995-04-25 | Plumber's need |