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in the PONS Dictionary

jack [dʒæk] N

1. jack TECH, AUTO:

2. jack (card):

jack

3. jack (plug):

jack

Jack [dʒæk] N inf

jack in VB trans Brit inf

jack up VB trans

2. jack up fig inf prices, rent:

Union Jack [ˈju:nɪənˈdʒæk, Am -njənˈ-] N (British national flag)

jack-in-the-box <-es> [ˈdʒækɪnðəbɒks, Am -bɑ:ks] N

Present
Ijack in
youjack in
he/she/itjacks in
wejack in
youjack in
theyjack in
Past
Ijacked in
youjacked in
he/she/itjacked in
wejacked in
youjacked in
theyjacked in
Present Perfect
Ihavejacked in
youhavejacked in
he/she/ithasjacked in
wehavejacked in
youhavejacked in
theyhavejacked in
Past Perfect
Ihadjacked in
youhadjacked in
he/she/ithadjacked in
wehadjacked in
youhadjacked in
theyhadjacked in