Source: Period dictionary
Dàap (ดาบ) is the Thai word for sword. In particular, the long curved sword with a long grip.
The first mention of the word is in a Thai-English dictionary of 1833, compiled by Eliza Grew Jones, a member of a Baptist missionary to Burma.1
1. Long thought lost, the manuscript was rediscovered in the British Museum in 2007 and digitized here.
A Thai dàap (ดาบ).
Mandarin Mansion stock 2020.