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the back of one's hand

the back of one's hand

10 6.0
Knowing a place or subject very well
  • idiom
translation icon : como la palma de la mano
  • I know this town like the back of my hand.
  • know like the back of one's hand
  • place like the back of one's hand
  • streets like the back of one's hand

Examples

Synonyms

to know
vsthe back of one's hand
1.0

To be familiar with someone, something, or a place from before

refers to much deeper, complete familiarity beyond mere experience or acquaintance
to know one's way around
vsthe back of one's hand
29 4.8

Can find things and use a place or topic easily

emphasizes more complete, thorough knowledge rather than just practical familiarity
to have a handle on
vsthe back of one's hand
16 4.2

To understand something well enough to deal with it

conveys deeper, more complete familiarity rather than only a workable grasp
like the back of one's hand
vsthe back of one's hand
12 5.4

Know a place or thing very well because you have seen it many times

is the same meaning but differs slightly in wording or form
from the back of one's hand
vsthe back of one's hand
  • Informal
8.2

To know something very well and do it easily

means the same but uses an alternative phrasing or preposition
to know one's shit
vsthe back of one's hand
  • Offensive
9.9

To have a lot of skill and information about a subject

is a neutral phrase for extreme, thorough familiarity without coarse language

Antonyms

316 3.9

Not knowing about something or how it works

A lack of knowledge or experience with something

How Familiar

the back of one's hand
10 6.0
to know what's what
  • Informal
15 6.7
familiar
476 2.8
acquainted
1 3.9
aware
2.7
unfamiliar
104 4.4

Surface Forms

Morphology

the + back + of + one + hand

The phrase literally names a body part ('back' + 'hand') and does not transparently convey the sense of thorough knowledge; the idiomatic meaning 'to know something extremely well' cannot be predicted from the constituent words alone. While some languages use comparable body‑part metaphors for familiarity, the metaphorical shift is language-specific enough that a B1 learner who knows the words would not reliably infer the idiomatic meaning without prior exposure.

Etymology

The back of one's hand comes from the simple idea that you see and touch the back of your hand every day, so you know its lines and marks very well. That's why it means 'to know something very well'.