follow through (on (something))

to continue something until it is completed.

It was an unpopular idea, but he followed through on it anyway.

I am sorry now that I didn't follow through with music lessons when I was younger.

Etymology: based on the sports meaning of follow through (= to continue the movement of a swing, even after hitting a ball)

• at home
• a thorn in someone's side
• a thorn in something's side
• a three-ring circus
• a tight-arse
• a tin ear
• a tin god
• at issue
• at knee
• at large
• at last
• at least
• at leisure
• at length
• at liberty
• at loggerheads
• at long last
• at loose ends
• at low ebb
• at most
• at mother's knee
• at no time
• at odds
• at odds with
• at odds with someone