Other forms: myriads
A myriad is an extremely great number. A myriad of stars, myriad forms, myriad ways.
Both constructions are correct and both are argued about: a myriad of reasons and myriad reasons have each been standard for centuries, and objections to the first are a nineteenth-century invention. In ancient Greek a myriad was exactly ten thousand, which is why the word can still mean a precise count in classical contexts. Note myriad as adjective and noun both.
1nounmyriadAn extremely great number.
“On a clear night in the desert, you can see a myriad of stars.”
2adjectiveadjectiveVery many.
“The city offers myriad ways to spend a weekend, from museums to markets.”
myriad is a great number.
MYRIad → what you see between two MIRRORs
Two mirrors facing each other, and the room goes on and on with no end to it.
hooks ontomirror
Greek myrias means ten thousand, from myrios, countless. The exact number and the vague vastness were both there from the start.
French
myriade
English, today
myriad
Built from
From French myriade. From French myriade, from Latin mȳriadem (accusative of mȳrias), from Ancient Greek μυριάς (“number of 10,000”), from μυρίος (“numberless, countless, infinite”). by surface analysis, myria- + -ad.
Etymology from Wiktionary, CC BY-SA
Practised in A Song of Ice and Fire