deflector

Thing that diverts

A deflector is a device or surface that redirects something away from its original path—typically air, water, light, or projectiles.

Cars have wind deflectors, spacecraft have heat deflectors, and science fiction features deflector shields that repel attacks: Raise the deflectors!

The term extends to people who habitually redirect conversation away from uncomfortable topics: He's a master deflector when asked about his past.

shield

barrier

Obstruction preventing passage

armorProtective combat covering
safeguardPrecaution against harm
bucklerSmall defensive arm disc

aegis · bulwark · guard · protection · defense · fortification · rampart · parapet · bastion · palisade

diversion

misdirection

Intentional focus manipulation

evasionAct of escaping detection
feintDeceptive mock attack
decoyFalse target for misdirection

distraction · blame-shifting · denial · avoidance · excuse · dodge · sidestep · rebuff · parry · counter

optics

prism

Light-splitting optical element

lensLight-focusing curved glass
mirrorReflective viewing surface
beamStructural support member

light · laser · refraction · angle · surface · bounce · redirect · optical · photon · ray

spacecraft

hull

Outer covering or frame

airlockTwo-doored pressure transition space
thrusterEngine providing forward force
navigationDetermining position and course

docking · module · sensor · telemetry · asteroid · debris · micrometeorite · orbital · reentry · heat shield

radiation

shielding

Protecting from harm

gammaGreek alphabet's third
betaGreek alphabet's second letter
alphaFirst Greek letter

particles · ionizing · neutrons · electromagnetic · nuclear · lead · dosimeter · contamination · exposure · attenuation

deflector

barrier

misdirection

prism

hull

shielding

deflector

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