trick·le 
(trĭkəl)
(trĭkəl)v. trick·led, trick·ling, trick·les
v.intr.
1. To flow or fall in drops or in a thin stream.
2. To move or proceed slowly or bit by bit: The audience trickled in.
v.tr.
To cause to trickle.
n.
1. The act or condition of trickling.
2. A slow, small, or irregular quantity that moves, proceeds, or occurs intermittently.
[Middle English triklen, perhaps variant of striklen, frequentative of striken, to flow; see STRIKE.]