To begin work at the start of the day or start of one's shift.
To record one's time of arrival at work, traditionally by inserting one's card into a timestamping machine.
To appear, arrive, or attend, especially suddenly or erratically.
To make visible or expose faults and deficiencies in, usually by outdoing, outperforming, or outcompeting another.
To make visible; to expose.
To be easily visible; to be conspicuous.