https://jsomers.net/blog/dictionary
Bryan Garner’s Modern American Usage is a phenomenal resource as well.
Like others have said, Wiktionary is a great resource, and is usually more authoritative. Many times the Google result would say “origin unknown” after listing the route a word in English took through Latin from Greek, while Wiktionary would settle on some PIE construct with links to cognates, etc.
I’ve even replaced the default English dictionary on my Kobo with one derived from Wiktionary, major win.
Or random websites trying to make 2.37$ out of ads, like worddefinitions.randomtld with an ad to sports gambling or something
half the time I'm just using it to make sure I have the spelling correct, but if I'm too off, I get some random Ai slop back rather than the most likely word I mispelled