crop up
/kɹˈɑːp ˈʌp/
verb
to appear or arise unexpectedly, often referring to a problem, issue, or situation that was not previously anticipated or planned for
"Problems crop up unexpectedly often."
"Some unexpected problems cropped up at work so I will be late getting home for dinner tonight."
pop up
/pˈɑːp ˈʌp/
verb
to appear or happen unexpectedly
"New problems keep popping up."
"New problems seem to pop up every time we think we have finally solved the old ones."
sprout up
/spɹˈaʊt ˈʌp/
verb
to experience a rapid and unexpected emergence of a significant number of things
"New shops sprout up."
"Following the economic boom, new businesses began to sprout up all over the downtown area."
take up with
/tˈeɪk ˈʌp wɪð/
verb
to dedicate one's time and energy to a specific activity or pursuit
"She will take up art."
"After retiring, he decided to take up with painting, dedicating several hours each day to his new hobby."
boot up
/bˈuːt ˈʌp/
verb
(of a computer or electronic device) to start and load the operating system into memory for use
"Boot up your computer now."
"It takes about a minute for my old computer to boot up completely after I press the power button."
set up
/sˈɛt ˈʌp/
verb
to establish a fresh entity, such as a company, system, or organization
"Set up the tent carefully."
"They plan to set up a small charity to help homeless people find shelter and food."
start up
/stɑrt əp/
verb
to start a process, organization, or activity
"She will start up a business."
"He decided to start up his own consulting firm after gaining years of valuable industry experience."
strike up
/stɹˈaɪk ˈʌp/
verb
to begin something, particularly a conversation or relationship
"Let's strike up talk."
"He decided to strike up a friendship with his new neighbor over a shared love of gardening."
take up
/teɪk əp/
verb
to make a new interest or hobby a regular part of one's life
"I will take up tennis."
"She decided to take up painting as a way to relax after work."
wash up
/wɑʃ əp/
verb
to be carried to a destination by the force of water
"The boat was washed up."
"After the storm, numerous pieces of driftwood were washed up along the coastline."