Broaden/expand/widen sb's horizons Verb + object/complement
To boost one's knowlege and experience
Reading books can broaden our horizons.
My dad encouraged me to participate in outside activities so that I can expand our horizons and widen my social circle.
A part-time job will widen your horizons.
To enhance one's performance, or the quality of one's work in order to do as well as others
The verb "broaden/expand/widen" should be conjugated according to its tense.
Indicates that something which initially seems bad but harmless can become much worse in the future or lead to a harmful development
Those pharmacies have put the price of face masks up. It'll be the thin end of the wedge, if others follow along.