More N2 vocabulary

• 公式こうしきformula, formality, official
• あいまいvague, ambiguous
• 拝見はいけん(hum) (pol) seeing, look at
• あひらあひらalternate spelling for duck; ohira
• 来日らいにちarrival in Japan, coming to Japan, visit to Japan
• 交差こうさcross