To obtest is to beg.(verb)
An example of to obtest is to get on your hands and knees to ask for something.
See obtest in Webster's New World College Dictionary
Origin: L obtestari < ob- (see ob-) + testari, to witness < testis, a witness: see testify
See obtest in American Heritage Dictionary 4
transitive verb ob·test·ed, ob·test·ing, ob·tests
Origin: Latin obtestārī
Origin: : ob-, to; see ob-
Origin: + testārī, to call as a witness (from testis, witness; see trei- in Indo-European roots).