The origin goes back to the Latin verb ‘Oboedire’ which means to serve.
S.E.E stands for Signing Exact English.
It’s more visual sign but it is somewhat improvised. Certain signals will have different prefixes and the same root sign. Signers gain a bigger vocab this way but it takes longer
P.S.E is Pidgin signed English. This helps keep the pace when corresponding with speaking. So words that aren’t that meaningful to the sentence are removed.
