We were sailing on (a/the) port 'tack'. [=with the wind coming from our port/left side]
The company decided to change 'tack'. [=to try using a different method/approach]
The porch looked like it was just 'tacked on/onto' the house.
(..) Damn it. Rachel! Open up! It's your sister. I have to talk to you. Hi, Amy. You're not Rachel. Still sharp as a tack! Um, Charlie, this is Rachel's sister, Amy. Amy, this is Charlie. Hi, nice to meet you/ Hi And you are? Ross. (..)2003 TvShow: Friends Title: The One Where Rachel's Sister Babysits Season: 10 Episode 5