IPA: /mɜːrsəˈnɛrɪli/
KK: /mɜrˈsɛnəˌrɪli/
In a way that shows a focus on personal gain or profit, often at the expense of ethics or principles.
He acted mercenarily, only interested in the money he could make from the deal.
Mercenarily → It is formed from "merces" (meaning reward or pay) and the suffix "-arily" (meaning in a manner). The word "mercenarily" describes acting in a way that is motivated by payment or reward, often implying a lack of loyalty or principle.
Think of 'merces' which relates to a reward or payment, and remember that acting 'mercenarily' means doing something for pay rather than for loyalty or principle.