Adjective
reconstructible (comparative more reconstructible, superlative most reconstructible)
Able to be reconstructed.
Consequently, its prehistory may not be reconstructible by means of the traditional comparative method except by applying it to differences between dialects within the language. Source: Internet
However, generally, only words with short /e o/ and long /ɛː ɔː/ are reconstructible back to Proto-Tai. Source: Internet