Bi-Weekly-Semi-Weekly | Commonly Confused Words

Bi weekly

/ˌbaɪˈwiːkli/

Occurring every two weeks or twice a week

/ˈsɛmi ˈwiːkli/

Occurring twice a week

This word has no synonyms

Bi-weekly can be confusing because bi typically means two, but in this context, it means every two weeks.
Semi-weekly means twice a week, which can be remembered by thinking of semi as half, implying happening more often.
Both terms deal with frequency, but bi-weekly involves a longer interval, whereas semi-weekly is more frequent.
Bi-weekly is like a two-week wait for a paycheck or an event, while semi-weekly means more immediate recurrence during the week.
When you hear bi-weekly, think of alternating weeks, but semi-weekly means you don't have to wait as long.