ahold…Mainly used in phrases such as catch, lay, take or get ahold of, on or upon something. I’d had no idea this was a single word and thought it was a typo when I came across it in the nyt the other day:
“It seems like the counterintelligence investigation should have been opened up against the Hillary campaign once it got ahold of the dossier.”
There does not, however, appear to be an agrip as in the phrase “get agrip on yourself.”