oftenThis is actually two pieces used together: は (pronounced "wa") attaches to the word before it to show what the sentence is about, and よく (yoku) means "often." Where English puts words like "on" or "in" before a time, Japanese puts は right after the time word or person, followed by よく to describe a regular habit. For example, 週末 (shūmatsu) means "weekends," so 週末はよく映画を見ます (shūmatsu wa yoku eiga o mimasu) means "On weekends, I often watch movies."