Accidentally

whole family

a small group

One hour

a small part

neither big nor small

accidentally; careless [written]

careless driving

Miss World

Small and medium

SMEs (Small and Medium Enterprises)

SME (small and medium-sized enterprises)

primary and secondary school

Four Asian Tigers: Hong Kong, Taiwan, Singapore and South Korea

humble one's self

to be an escort in a nightclub; to be a prostitute [written and colloquial]

Detective Fiction

discuss or finalise about the practicals or actuals before emotions and relationships comes into consideration (business)

Winter wheat

Winnie Lau, a singer in Hong Kong

weak; feeble; fragile; lacking in strength [written and colloquial]

half an hour

scum; sneaky or despicable person

can be serious or trivial

four hours [written and colloquial]

primary school

to minimise big problems, to turn small issues into no problems

essentially the same but with minor differences

all sizes

size