o'clock; hour
Attached to a number to indicate the hour of the day. Used in telling time.
What time is it now?
I get up at 7 o'clock.
The meeting starts at three o'clock.
In case of emergency, please press this button.
At mealtimes, the family always gathers.
When the earthquake hit, I hid under the desk.
I wash my hands when I eat.
時 as a suffix pinpoints a specific moment or occasion, whereas 時間 refers to a stretch or duration of time.
time · hour · period; class; lesson
period; epoch; era; age · the times; those days · oldness; antiquity · antique; period piece
time; season; period; phase; stage
at that time; in those days
point in time; time; moment
The suffix 時 (じ) is derived from the noun 時 (とき, 'time'), used in compounds and after numbers to indicate a specific time or occasion.
date and time · days and hours
hourly wage; hourly pay
temporary; provisional; interim · special; extraordinary; extra
fixed time; regular time; scheduled time · fixed period; scheduled period
usually; ordinarily; at all times · continuous; 24-hour; always on
as needed; whenever necessary; on demand · at any time; at all times
wartime
spacetime; space-time
speed per hour; hourly speed
current affairs; events of the day
time difference; time-zone difference; difference in timing
immediate; prompt; in real time
instant; moment; split second
statute of limitations; prescription; lapse of rights after a period of time · becoming invalid or void after a set time · ageing; aging
class period; school period · time period; time limit
what time; which hour
time signal; time announcement · news report; newsletter
current market value; market price
emergency; time of emergency
reduction in working hours; reduction in business hours · time-saving
the times; the world; society
peacetime; time of peace · ordinary times; normal times