Translation guide
Expressing that something is parallel to something else, either geometrically or figuratively.
Describing lines, edges, or surfaces that are equidistant and never meet.
The most common way to say 'parallel to' in a geometric sense. 平行 (へいこう) means 'parallel'. Attach な to modify a noun.
この線はあの線と平行です。
This line is parallel to that line.
平行な二本の線を引いてください。
Please draw two parallel lines.
Expressing that two situations, developments, or ideas are similar or analogous.
Used for events or actions happening in parallel, simultaneously or along similar lines. 並行 (へいこう) can also be written 平行, but 並行 is more common for figurative use.
二つのプロジェクトが並行して進んでいる。
The two projects are progressing in parallel.
Describing components connected in parallel in an electrical circuit.
平行 (へいこう) is primarily geometric. 並行 (へいこう) is for simultaneous or analogous progress. 並列 (へいれつ) is technical for electrical or data parallel connections. In many figurative contexts, 並行 is preferred over 平行.
Noun meaning 'parallel'. Can be used in compounds or with する to mean 'to be parallel'.
この二つの道路は平行している。
These two roads run parallel to each other.
In parallel with the investigation, we made a new plan.
Means 'at the same time as', often used when two things happen concurrently, not necessarily similar.
仕事と同時に育児もこなす。
She manages childcare in parallel with her job.
Literally 'along', can imply following a parallel course or guideline.
川に沿って道が続いている。
The road runs parallel to the river.
Technical term for 'parallel' in electrical contexts. Often used as 並列回路 (parallel circuit) or 並列に接続する (connect in parallel).
これらの抵抗は並列に接続されている。
These resistors are connected in parallel.