Both 恣 (シ) and 意 (イ) are on'yomi. しくい and しき are incorrect as 恣はシ and 意はイ. じい is wrong because 恣 is a clear sound, not voiced. 恣意 refers to acting purely based on one's own will or discretion, often implying a lack of objective reasoning or fairness, thus arbitrariness.

恣 (シ) と 意 (イ) は共に音読みです。しくいやしきは誤読で、じいも恣の清音を濁音で読む間違いです。恣意とは、自分勝手な考えや判断で行動すること、客観的な根拠に欠ける独断的な態度を指します。