For non-idiomatic uses: see faire (“do”) and ne...que (“nothing but”); only, merely, just; indicates a continued or repeated action, especially if excessive or undesirable: keep
not to know how right one is (said when someone who has uttered a statement doesn't know that this statement is even truer than they thought, for example because there is another dimension to it that they weren't aware of)
to take no prisoners; to do no favours (to); to not make things easy (for); to be very strict (to), to cut (someone) no slack; to be ruthless or merciless (to)
to follow (someone) everywhere, to stay close to (someone) all the time, to breathe down someone's neck, to stick to (someone) like glue, like a leech, to dog (someone's) footsteps
not to be lacking in spice, not to be without a certain piquancy, not to lack punch, not to be boring; to be interesting; to be witty; to be surprising; to be a bit rich, to be a bit cheeky