General noun for liquid falling in drops or a thin stream; can refer to the act of dripping or the drops themselves.
water trickling from moss, rocks, or cliffs in summer
Seasonal word (kigo) for summer, evoking the cool, refreshing sight or sound of water seeping from natural surfaces.
The dripping of water from the faucet won't stop.
Raindrops are dripping from the tips of the leaves.
On a summer mountain path, the water trickling from mossy rocks looks refreshingly cool.
Derived from the verb 滴る (したたる, 'to drip'). The noun form 滴り nominalizes the continuative stem, referring to the act or result of dripping.