1trick·le 
/ˈtrɪkəl/ verb
trick·les; trick·led; trick·ling /ˈtrɪkəl/ verb [no obj] 1 : to flow or fall in drops
▪ Tears trickled down her cheeks. ▪ Water was trickling out of the gutter. 2 always followed by an adverb or preposition : to move or go slowly in small numbers or amounts
▪ People trickled into the theater. ▪ Donations have been trickling in.
▪ Tears trickled down her cheeks. ▪ Water was trickling out of the gutter.
▪ People trickled into the theater. ▪ Donations have been trickling in.
trickle down [phrasal verb]
: to spread from the upper levels of a society, organization, etc., to the lower levels — used especially to describe the movement of money through an economic system ▪ They believe that the benefits of the tax cut for corporations should eventually trickle down to the average consumer. — see also trickle-down
