New Zealand's bowlers dominated as they restricted Ireland to 216 all out in the second one-day international on Tuesday.
Matt Henry, Michael Bracewell and Mitchell Santner took two wickets each to keep the Black Caps on track to win the three-match series.
Having narrowly won the first match of the series by one wicket on Sunday, New Zealand established a stranglehold on a tricky pitch at Malahide despite George Dockrell's career best ODI score of 74 from 61 balls.
Setting the tone with a wicket maiden that included the dismissal of Paul Stirling, Henry also removed Andy Balbirnie to leave Ireland 5-2.
Henry and Jacob Duffy, making his ODI debut, turned the screw on Ireland as the hosts managed to reach only 19-2 after the first powerplay.
Ireland needed 21 balls to get off the mark and 57 balls to hit a boundary through Andy McBrine.
McBrine scored 28 off 48 balls before Bracewell had him stumped, starting a tight spell of 10 overs for just 26 runs.
Santner, back from a bout of Covid-19, kept the pressure on for New Zealand with a tidy spell.
Dockrell and Simi Singh amassed a 59-run seventh-wicket stand off 48 balls.
Reaching his third ODI fifty off 48 balls, Dockrell hit three fours and a six in the space of just six balls.
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Duffy ended Dockrell's run-spree with his maiden ODI wicket before Mark Adair's rapid 27 off 15 balls took Ireland past 200.