A nozzle assembly for an inkjet printhead includes a substrate assembly defining an ink inlet aperture; a nozzle comprising a wall portion extending from the substrate assembly to bound the ink inlet aperture, and a moveable crown portion from which a skirt portion depends, the wall portion and the skirt portion defining a peripheral wall of a nozzle chamber; an anchor extending from the substrate assembly; and a thermal bend actuator connected between the anchor and a lever arm. The lever arm is in turn connected to the nozzle. The thermal bend actuator, upon actuation, moves the crown and skirt portions relative to the wall portion to eject ink in the nozzle chamber out through the nozzle opening. The skirt portion and the wall portion are separated by a gap, and the wall portion is shaped with an inwardly directed lip in the vicinity of the gap, the inwardly directed lip facilitating the formation of a fluidic seal effected via surface tension across the gap.