イベントに参加してくださった皆様に心から感謝申し上げます

Meaning: we would like to extend our heartfelt thanks to everyone who attended the event

イベント: event, an event, festival, show, exhibition
に: in, to, on, at, into, upon
参加: join, attend, participate, participation, joining, attendance, enlist
し: and, shi, four, death
て: the, it, have
くださる: us, give
た: the, was, ta, da, other
皆: everyone, all, everybody, everything
様: like, sir, mr, kind, way, ms, lord, lady, so that, madam, sort, manner, mrs, appearance
に: in, to, on, at, into, upon
心: heart, mind, spirit, mental, minded, cardiac, core, wick
から: from, at, because, out of, by, since, off, after
感謝: thank, thanks, appreciate, grateful, gratitude, appreciation, thankful
申す: say, tell, be called, to say, to speak, to tell
上げ: raise, raised, lift, raising, elevate
ます: will, to be, i will, to make, to do, to have