Phrasal verbs starting with I/J/K

Idle away

Waste time doing nothing much

Iron out

Resolve by discussion or eliminate differences

Indulge in

Allow yourself to enjoy something

Insure against

Guarantee compensation for damage or injury

Invite out

Ask someone to join you for lunch or dinner

Join in

Participate in something

Join up

Engage in or become a member of

Jot down

Take quick notes

Keep at

Persevere

Keep back

Retain or force to stay back