1. Things will get lost in translation, and will change meaning over time. 2. Different words will come to mean the same thing as something else. 3. The use of the word could be different from what it was originally meant to be.
'Every word has a variety of senses and connotations, which can be added, removed, or altered over time, often to the extent that cognates across space and time have very different meanings. The study of semantic change can be seen as part of etymology, onomasiology, semasiology, and semantics.'
