There are 2 definitions of groin in English:

groin1

Syllabification: groin
Pronunciation: /groin
 
/

noun

  • 1The area between the abdomen and the thigh on either side of the body.
    More example sentences
    • Patients may have pain in the anterior groin, anterior thigh, buttock, greater trochanter, or medial knee.
    • Swelling and tenderness was noted in the groin and proximal thigh.
    • In femoral fractures, patients usually complain of pain in the groin, anterior thigh, or knee, as well as painful range of motion of the hip.
  • 1.1 informal The region of the genitals.
    More example sentences
    • The defender's right elbow is locked and her hand cannot strike the attacker's groin.
    • The heavy man clutched his groin in pain and fell to his knees on the ground.
    • Now he dropped the sword and she brought her knee up into the man's groin.
  • 2 Architecture A curved edge formed by two intersecting vaults.
    More example sentences
    • It is characterized by heavy, load-bearing masonry, the round-headed arch and its derivatives, the groin, and barrel vaulting.
    • Gilt threads glittered in the weave of pennants and tapestries and high overhead a gold-trimmed groin vault shouldered off the arches of a marble ceiling.
    • The corridor opened into a T-junction in a groin vault serving as a landing for a broad, dimly-lit staircase.

Origin

late Middle English grynde, perhaps from Old English grynde 'depression, abyss'.

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Word of the day kerf
Pronunciation: kərf
noun
a slit made by cutting with a saw

There are 2 definitions of groin in English:

groin2

Syllabification: groin
Pronunciation: /
 
groin/
(also groyne)

noun

  • A low wall or sturdy timber barrier built out into the sea from a beach to check erosion and drifting.
    More example sentences
    • Four new groynes - timber planking walls running down the beach towards the water - will help trap sand and give greater protection to the base of the wall.
    • Visit any coastal area and you will see defence features such as groynes, sea walls and banks.
    • We're blowing all this money to build houses and ruin habitat with so-called beach renourishment and jetties, groins and seawalls.

Origin

late 16th century: from dialect groin 'snout', from Old French groign, from late Latin grunium 'pig's snout', from Latin grunnire 'to grunt'.

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