Loggerhead

[law-ger-hed, log-er-] /ˈlɔ gərˌhɛd, ˈlɒg ər-/

noun
1.
a thick-headed or stupid person; blockhead.
2.
.
3.
.
4.
a ball or bulb of iron with a long handle, used, after being heated, to melt tar, heat liquids, etc.
5.
a rounded post, in the stern of a whaleboat, around which the harpoon line is passed.
6.
a circular inkwell having a broad, flat base.
Idioms
7.
at loggerheads, engaged in a disagreement or dispute; quarreling:
They were at loggerheads over the distribution of funds.
/ˈlɒɡəˌhɛd/
noun
1.
Also called loggerhead turtle. a large-headed turtle, Caretta caretta, occurring in most seas: family Chelonidae
2.
loggerhead shrike, a North American shrike, Lanius ludovicianus, having a grey head and body, black-and-white wings and tail, and black facial stripe
3.
a tool consisting of a large metal sphere attached to a long handle, used for warming liquids, melting tar, etc
4.
a strong round upright post in a whaleboat for belaying the line of a harpoon
5.
(archaic or dialect) a blockhead; dunce
6.
at loggerheads, engaged in dispute or confrontation
n.

1580s, “stupid person, blockhead,” perhaps from dialectal logger “heavy block of wood” + head (n.). Later it meant “a thick-headed iron tool” (1680s), a type of cannon shot, a type of turtle (1650s). Loggerheads “fighting, fisticuffs” is from 1670s, but the exact notion is uncertain, perhaps it suggests the heavy tools used as weapons. The phrase at loggerheads “in disagreement” is first recorded 1670s.