negative regulation of natural killer cell activation
down regulation of natural killer cell activation
exact
down-regulation of natural killer cell activation
exact
downregulation of natural killer cell activation
exact
inhibition of natural killer cell activation
narrow
negative regulation of NK cell activation
exact
Any process that stops, prevents, or reduces the frequency, rate or extent of natural killer cell activation.
GO:0032814
regulation of natural killer cell activation
is_a
GO:0051250
negative regulation of lymphocyte activation
is_a
GO:0030101
natural killer cell activation
negatively_regulates