English

lockshield

From lock + shield.

A compound of lock + shield

Proto-Indo-European *lewg- ‘to bend’

Proto-Germanic *luką

Proto-West Germanic *lok ‘shutter’

Old English loc

Middle English lok

English lock

Proto-Indo-European *(s)kelH- ‘cut, split’

Proto-Germanic *skelduz

Proto-West Germanic *skeldu

Old English scield

Middle English scheld ‘a shield’

Today it means

noun A kind of radiator valve used to balance the system by restricting the flow of water on the return side.

Language periods are conventional ranges, not dates for this word.

Etymograph / lockshield