1 next in sequence

2 second

3 the second (day, time etc)

4 secondary

5 vice-

6 sub-

7 infra-

8 inferior quality

9 substandard

10 order

11 sequence

12 hypo- (chemistry)

13 classifier for enumerated events: time

1 to repeat

2 repetition

3 again

4 re-

5 classifier: layer

1 important

2 significant

3 major

1 one-off (offer)

2 one-time

3 single-use

4 disposable (goods)

1 person-times

2 visits

3 classifier for number of people participating

1 each word carries weight

2 a promise must be kept (idiom)

1 over and over again (idiom)

1 to take sth as a lesson for next time (idiom)

2 once bitten, twice shy

1 lit. not knowing what's important (idiom); no appreciation of the gravity of things

2 naive

3 doesn't know who's who

4 no sense of priorities

1 you can't judge a person by appearance, just as you can't measure the sea with a pint pot (idiom)