noun
conversational ability; speaking ability
Refers to one's skill in carrying on a conversation, often in a foreign language or social context.
彼は英語の会話力が高い。
He has high conversational ability in English.
会話力を上げるには、実際に話す練習が一番だ。
To improve your speaking ability, practicing actual conversation is best.
語学力 is broader, covering overall language proficiency including reading and writing, whereas 会話力 focuses on spoken interaction.
Compound of 会話 (kaiwa, 'conversation') and 力 (ryoku, 'power, ability').