How to remember 'melatonin'

One user wonders if there's a better way to remember the English word melatonin ("A hormone, related to serotonin, that is secreted by the pineal gland, and stimulates colour change in the skin of reptiles, and is involved in the sleep/wake and reproductive cycles" according to Wiktionary). And I said,

If you know melancholy ("depression"; "sorrow"), you will remember half of it. The first half, melan- is the same as mela- of melatonin in origin, meaning "black" in Ancient Greek. For -tonin, think of tonic (so literally melatonin is "black tonic" and melancholy is "black bile"). If you don't know melancholy, you can use a pure mnemonic. For instance, imagine that Carmela and Tony both have a dark or black face. Etymology plus mnemonics can help you memorize almost all words of a language. Some adults memorize words purely by rote memory, while others rely on some analysis of the words to remember them. I'm among the latter group. Children and young people are mostly in the first group.

The above example is of an English word. But the idea is the same for words in any language. If you wonder how I think of melancholy, I used the Windows console command

C:\temp> findstr mela words.txt | more
acromelalgia
Amelanchier
amelanchier
...
melancholomaniac
melancholy
melancholyish
...

where words.txt is from a Linux server under /usr/share/dict. You can also download it from my web page. If you don't use this method, you can of course try to think of various combinations and may eventually get it. But with this Windows command, you're doing a systematic search and it saves time in those cases where a match is not obvious.