treat with

treat with (someone or something)

1. To handle or deal with someone or something with a particular type of attitude or behavior. In this usage, a noun or pronoun is used between "treat" and "with." He has treated me with nothing but contempt since I got the promotion. Students who treat this project with indifference will suffer the consequences in their grades.
2. To attempt to reach an agreement or settlement with someone, as through negotiations. Police are treating with the criminals to avoid any casualties among the hostages. We refuse to treat with any nation that does not give its citizens basic human rights.
See also: treat
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.

treat with

v.
To engage in negotiations with someone so as to reach a settlement or agree on terms: If they are unwilling to treat with us, we will be forced to attack.
See also: treat
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
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References in classic literature ?
We were willing to be assured of a good reception in this port; the patriarch therefore sent me to treat with them.
So this is one category where it definitely pays to expand your set," said Kuhn, whose newest treat SKUs are Woodland Loops, a high-fiber cheerios-type treat with Timothy Dandelion and Rosehip, and Garden Sticks, both by Supreme Petfoods (https://supremepetfoods.com/).
(1-8) EPD can provide effective desensitization to agents that have been difficult or impossible to treat with conventional techniques.
"This is a technically challenging site to treat with any technique, because of the close proximity of the spinal cord," said Andrew Poynter, head of the Radiotherapy Physics Department at Ipswich Hospital.