IPA: /ˈstreɪtəˌweɪ/
KK: /ˈstreɪtəˌweɪ/
Not having any curves or bends; direct and immediate.
She gave a straightaway answer to the question without hesitation.
Without any delay; immediately or at once.
She left the meeting straightaway to catch her flight.
A section of road or track that is straight and does not have any curves.
The car sped down the straightaway, gaining speed without any turns.
Straightaway → It is formed from "straight" (from Old English *streht*, meaning direct or not bent) and "away" (from Old English *aweg*, meaning from this place). The word "straightaway" means directly or immediately from this place without deviation.
Think of going 'directly' ('straight') and 'from this place' ('away') — that's why straightaway means immediately.
No commonly confused words.