The phrase "lessen the possibility" is correct and usable in written English.
You can use it when you want to express that something might become less likely to happen. For example: "By wearing a helmet while biking, we can lessen the possibility of head injuries."
Such tailoring will likely lessen the possibility of GPs disengaging with interventions or believing that they are not possible in their own practice and may ultimately help to increase an intervention's effectiveness.
It's better to remove it immediately to lessen the possibility of a legal action.
Long ago we realized that paying sports figures well was one way to lessen the possibility of external influence on professional sports.
In addition, permanently venting the furnace area and the heating appliance to the outside should greatly lessen the possibility of poisonous buildup.
Anyone concerned with the potential health risks can take several steps to lessen the possibility of cancer, however distant it may be.
But if we retreat behind Snapchat videos, WhatsApp messages and Facebook posts, we lessen the possibility of an encounter that could teach us about one another and ourselves.
At best I wanted to lessen the possibilities.
The addition of a third chamber, between the front and the back bedroom, to serve as dressing room and washroom, was the first step backward; it lessened the possibility of through ventilation.
A letter from Trump's lawyers sent to Mueller around noon on Wednesday significantly lessens the possibility of a voluntary presidential interview, according to two people familiar with the discussions.
Collaboration on an international scale also was attractive in that it lessened the possibility of a participant's canceling a project before completion, as many agreements had penalty clauses to discourage premature pullout and political pressure could be exerted from other team members.
LPM is well suited for metal sensitivity studies because it contains negligible phosphate and therefore lessens the possibility of metal precipitating as metal phosphate (Kumar et al. 2013b).
