undersend
To send beneath, under, or through; submit.
transitive
Is sorry Sir Bassingbourne should have so much trouble in getting his glass. Undersends the charge.
To send less than required, needed, or requested.
One approach would be to build a meter that looks at the very long-term average rate, and allows the TCP to send so long as that average is less than the target rate. However, this has the severe drawback that if the TCP undersends for some time because it has no data to send, it builds up a credit in the meter that allows it to exceed the average rate for an excessive time.
Where it comes from
From Middle English *undersenden (attested only in the past participle undersent), equivalent to under- + send. Compare Dutch onderzenden, Middle High German undersenden.
Adapted from the Wiktionary entry undersend (CC BY-SA 4.0).