直通
ちょくつう · chokutsuu · JLPT N2 · noun
connection
🔗 直 (straight) + 通 (pass through) = straight-through = direct connection
ちょくつう is 直 (choku, straight) plus 通 (tsuu, pass through or connect). A route that goes straight through with no stops is a direct connection.
直 — 十 ten + 目 eye + 乚 hidden line
Originally depicted an eye (目) looking straight along a vertical line, suggesting a direct, unswerving gaze. The form combines 目 'eye' with strokes indicating straightness. From this came the meanings 'straight,' 'upright,' and by extension 'honest' or 'direct.'
通 — 辵 (辶) walk + 甬 yǒng (phonetic)
通 is a semantic-phonetic compound. The 辶 (chuò) component means 'walk' or 'movement', giving the meaning of going through or passing. 甬 (yǒng), originally depicting a hanging bell or a path, supplies the sound. Together they convey 'to pass through, communicate, connect'.