1.
side, beside
The area next to or beside something; the side of something.
脇に寄ってください。
Please move to the side.
道の脇に車を止めた。
I parked the car at the side of the road.
脇役だが重要な役だ。
It's a supporting role, but an important one.
脇役 = supporting role/actor
2.
armpit
The hollow area under the arm where it joins the body.
脇が甘い。
His guard is down. / He's careless.
脇が甘い = to be careless, to let one's guard down (idiomatic, from the armpit area being an unguarded spot)
脇に抱えて運んだ。
I carried it tucked under my arm.
脇に抱える = to carry under one's arm
夏になると脇の汗が気になる人が多い。
In summer, many people worry about armpit sweat.
USAGE: 脇 refers to the side of something or the armpit area. Often used in compounds.
COMMON PATTERNS:
- 脇に (beside, at the side of)
- 脇を通る (to pass by the side)
- 脇役 (supporting role)
- 脇道 (side road)
- 脇見 (looking away, distraction)
BODY PART: When referring to the armpit, 脇の下 is more specific.