確実性 (translations)→ certitude security
確信 (translations)→ certain clarity confidence confident conviction positivity sure surety
根拠 (translations)→ base case evidence merit pointer ratio rationale reason source
必ず (translations)→ always certainly every invariably obligatory regularly undoubtedly
落ち着き (translations)→ aplomb composed composure demeanor discomfort normalcy self-possession
