makeshift
Temporary and not perfect, made quickly with available things.
Makeshift means temporary and improvised, created quickly from whatever materials are available because you don't have the proper tools or equipment. When something is makeshift, it's a quick solution that gets the job done even though it's not ideal.
If you break your shoelace right before gym class, you might tie the two ends together as a makeshift repair until you can get a new lace. When a fort made of couch cushions serves as a makeshift castle for an afternoon of pretend play, you're using what's on hand rather than building something permanent. During emergencies, people create makeshift shelters from tarps and branches, or use a backpack as a makeshift pillow.
A makeshift solution shows resourcefulness: instead of giving up because you lack the perfect tool or material, you figure out a clever substitute. Scientists in remote locations might build makeshift laboratories in tents. A broken zipper repaired with a safety pin, a textbook propped under a wobbly desk leg, or a rope tied into a loop to serve as a jump rope: these are all makeshift solutions that work well enough until something better comes along.