to avoid getting too close to someone
誰かと距離を置く (dareka to kyori o oku)
"After the argument, I kept him at arm’s length."
"口論の後、彼とは距離を置いた。" (koron no ato kare to wa kyori o oita)
to be very brave and bold
To try to solve a problem by spending a lot of money instead...
to reduce choices to a smaller number
to say something positive and hope it continues to be good
someone very experienced at something
at the forefront of innovation or technology
