IPA: /ˈbærənli/
KK: /ˈbærənli/
In a way that is unproductive or lacking in growth; without producing any results or benefits.
The land was barrenly dry, yielding no crops for the farmers.
Barrenly → It is formed from "barren" (from Old French *barain*, meaning unproductive or sterile) and "-ly" (meaning in a manner of). The word "barrenly" means in a manner that is unproductive or lacking in growth.
Think of 'barren' meaning unproductive, and remember that 'barrenly' describes doing something in an unproductive way.