"What I want to say, I can't put into words very well."
- "I can't articulate what I want to say."
"I can't articulate" 「うまく表現できません」
"what I want to say" 「伝えたい言葉」・「言いたいこと」
- "What I want to say, I can't put into words very well."
"what I want to say" 「伝えたい言葉が」
"I can't ~" 「〜できません」
"put into words very well" 「うまく表現する」