おもうまま
as one wishes; as one pleases; to one's heart's content
Also written 思う儘、思うママ、思う侭
Adverb, Noun, Na-adjective
彼かれの思おもうままにならないのが言語げんごなのだ。
What he can't manage at will is language.
チャンピオンは挑戦者ちょうせんしゃたちを思おもうままにあしらった。
The champion had the challengers at his mercy.