This word is acceptable for play in the US & UK dictionaries that are being used in the following games:

• Lexulous
• Wordscraper
• Wordosaur

v. Present participle of tier.

"Technically speaking, QoS tiering is not entirely antithetical to some net neutrality proposals (i.e. some proposals allow for QoS tiering)."

effortful   

tiresome   

tire   

acquiring    admiring    aspiring    conspiring    expiring    firing    hiring    inspiring    perspiring    quiring