1580s, "the action of admitting," formed in English from admit + -ance (if from Latin, it would have been *admittence; French uses accès in this sense). Used formerly in senses where admission now prevails. Admissure was used in this sense from mid-15c.
权威例句
1. We had not been able to gain admittance to the flat.
我们未能获准进入公寓。
2. Hundreds of people were unable to gain admittance to the hall.