1. to suddenly become active.

I was standing on the golf course when the sprinkler system sprang to life without warning.

2. to begin existing.

The company sprang to life in 1939 as a manufacturer of testing instruments.

• hail from
• hail from somewhere
• hair of the dog
• hair of the dog that bit you
• hair out of place
• hair-raising
• hair's breadth
• hair shirt
• hair-splitting
• halcyon days
• hale and hearty
• half
• half a dozen
• half a loaf
• Half a loaf is better than none.
• half-arsed
• half-baked
• half-hearted
• half-heartedly
• half the battle
• halfway house
• half-wit
• half-witted
• ham-fisted
• ham it up