反 射 的(はんしゃてき)

はんしゃてき

na-adjective

reflexive; instinctive; automatic

movement descriptive

1. reflexive; instinctive; automatic; involuntary

Describes a reaction or response that happens instantly and without conscious thought, like a physical reflex.

反射的(はんしゃてき)に手(て)が出(で)た。

My hand shot out reflexively.

大(おお)きな音(おと)に反射的(はんしゃてき)に振(ふ)り向(む)いた。

I reflexively turned around at the loud noise.

危険(きけん)を感(かん)じると、人(ひと)は反射的(はんしゃてき)に身(み)を守(まも)ろうとする。

When people sense danger, they instinctively try to protect themselves.

反射的(はんしゃてき) describes reactions that happen instantly and involuntarily — like a reflex. From 反射(はんしゃ) (reflection/reflex) + 的(てき) (adjectival suffix).

Forms

反射的(はんしゃてき)な + noun: reflexive (modifier)
反射的(はんしゃてき)に: reflexively, instinctively (adverb — most common form)

Common collocations

反射的(はんしゃてき)に動(うご)く: to move reflexively
反射的(はんしゃてき)に答(こた)える: to answer instinctively
反射的(はんしゃてき)に身(み)を引(ひ)く: to flinch reflexively
反射的(はんしゃてき)な行動(こうどう): reflexive behavior

Usage

Describes both physical reactions (flinching, dodging, turning around) and verbal responses (blurting something out). Always implies the action was not deliberate.

Similar words

本能的(ほんのうてき): instinctive (driven by innate instinct, not necessarily fast)
無意識(むいしき)に: unconsciously (broader — can include habits, not just reflexes)

Related Words

Synonym: 本能的(ほんのうてき) (instinctive)

Compare: 無意識(むいしき)に (unconsciously (broader)

Compare: 発作的(ほっさてき) (fit-like)

general

Added 2026.3.14 22:09 · Revised 2026.9.4 9:35

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