This is the 5911th most frequent Japanese word.
むやみ
"むやみ" means "reckless" or "thoughtless."
In this sentence, 'むやみ' is used to describe an excessive and thoughtless manner of spending.
彼はむやみにお金を使ってします。
He spends money recklessly.
Here, 'むやみ' conveys the idea of trusting without discretion or caution.
むやみに人を信じることは危険です。
It is dangerous to trust people indiscriminately.
'むやみ' in this context emphasizes the notion of acting without forethought or preparation.