side pieces

Glasses' ear supports

Side pieces are secondary romantic or sexual partners—people someone sees while in a primary relationship.

The term implies the relationship is unofficial, often secret: He found out she had a side piece the whole time they were married.

Less commonly, side pieces are literal pieces positioned at the sides of something, like the arms of eyeglasses.

infidelity

mistress

Illicit female lover

  • affairRomantic entanglement outside commitment
  • cheatingDeceptive rule-breaking
  • adulteryMarried person's sexual betrayal

lover · extramarital · paramour · fling · betrayal · homewrecker · unfaithful · disloyalty · entanglement · liaison

secrecy

clandestine

Concealed from authorities

secret · furtive · surreptitious · concealed · private · undercover · incognito · burner phone · sneaky · hush-hush

chess

rook

Chess piece or corvid

  • bishopDiocesan clergy head
  • knightHonored mounted soldier
  • pawnUnwitting tool of another

queen · king · castle

furniture

armrest

Chair's lateral support

sectional · modular · component · attachment · extension · throw pillow · end table

Opposites
eyewear components

side pieceslenses

Curved transparent refractors

nose pads · bridge · rims · eyepieces

relationship status/primacy

side piecesmain squeeze

Slang for partner

primary partner · spouse · wife · husband · significant other

spatial position in structure

side piecescenter piece

Table's decorative focus

centerpiece · back piece · core

Family

side, piece, sides, sided, siding, sideway, sideways, sidelong, beside

Familiarity
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Negative · Everyday, not technical · Rated PG-13