on

عِنْدَ \ at: (showing a point of time): at midday; at 4 o’clock; He was married at 18, (showing where) at home; at the office. beside: at the side of: She sat down beside me.. by: near; at the side of: I live by the river. on: showing when: on Monday; on my arrival; on leaving home. towards: (of time) near, just before: Towards evening it began to rain. \ See Also قرب (قُرْب)‏