assurance, firm, tight, hard, solid, confirm, clear, evident

Examples

• 適確(てっかく): precise; accurate
• 確実(かくじつ): certainty; reliability; soundness
• 確保(かくほ): guarantee; maintain; ensure; insure; secure; reservation
• 明確(めいかく): clear; precise; definite; distinct
• 確か(たしか): (1) certain; sure; definite (2) if I'm not mistaken; if I remember correctly
• 確認(かくにん): affirmation; confirmation; validation
• 確立(かくりつ): (1) establishment; settlement (2) to establish; to settle
• 確定(かくてい): (1) decision; settlement (2) definition
• 確率(かくりつ): probability; likelihood; chances
• 確信(かくしん): conviction; belief; confidence
• 確かめる(たしかめる): to ascertain; to check; to make sure
• 正確(せいかく): accurate; punctual; exact; authentic; veracious
• 確り(しっかり): firmly; tightly; reliable; level-headed; steady

Kanji Level

• JLPT Level: N3
• Jouyou Grade: 5
• Frequency: 252