multilaser

The story

1. Proto-Italic*moltos
2. Latinmultus
3. Latinmultī
4. Middle Englishmulti-
5. Englishmulti-
6. Proto-Germanic*leuhtą
7. Proto-West Germanic*leuht
8. Old Englishlēoht
9. Middle Englishlight
10. Englishlight
11. Englishamplification
12. Proto-Indo-European*(s)tey-?
13. Latinstimulus
14. Latinstimulo
15. Latinstimulatus
16. Englishstimulate
17. Englishstimulated
18. Latinēmittō
19. Latinēmissiō
20. Middle Frenchémission
21. Englishemission
22. Latinradiatio
23. Englishradiation
24. EnglishLASER
25. Englishlaser
26. English todaymultilaser

From multi- + laser.