Translation guide
The English word "invariable" describes something that never changes or is always the same. In Japanese, this concept is expressed through adjectives, adverbs, and set phrases that emphasize constancy, unchangeability, or fixed patterns.
Describing a state, quality, or condition that does not vary over time.
A noun or na-adjective meaning 'unchanging' or 'constant'. Often used in formal or written contexts.
The laws of nature are invariable.
The negative form of 変わる (to change), meaning 'unchanging' or 'constant'. This is the most common and natural way to express 'invariable' in everyday speech.
His daily routine is invariable.
A noun or no-adjective meaning 'fixed', 'constant', or 'uniform'. Often used for rates, intervals, or conditions that are set and do not fluctuate.
Keep the temperature invariable.
A na-adjective meaning 'constant' or 'permanent'. Used in formal or technical contexts to describe something that remains unchanged over a long period.
There is an invariable demand.
Expressing that something happens every time or is always true.
An adverb meaning 'always', 'without fail', or 'invariably'. It emphasizes that something happens every single time.
He invariably arrives late.
A common adverb meaning 'always'. It is less emphatic than 必ず but very natural in casual conversation.
An adverb meaning 'invariably' or 'without fail', often implying a predictable pattern or habit.
A slightly formal adverb meaning 'always' or 'constantly'. It suggests a continuous, unchanging state.
必ず (kanarazu) is the strongest, meaning 'without exception'. いつも (itsumo) is the most common and neutral 'always'. 決まって (kimatte) implies a predictable, often habitual pattern, sometimes with a nuance of 'as usual' or 'sure enough'.
While 不変 (fuhen) directly translates 'invariable', it can sound stiff or technical. In everyday conversation, 変わらない (kawaranai) or adverbial phrases like 必ず (kanarazu) are more natural.
彼女はいつも笑顔だ。
She is invariably smiling.
日曜日は決まって雨だ。
It invariably rains on Sundays.
彼は常に冷静だ。
He is invariably calm.