a bundle tied with string
a piece of string
[W]e used to have oil lamps, which used a cotton string dipping in the oil in [a] small bottle, and [we] burned the tip of the cotton string to give us light during the night time, it was very little light, and many things we couldn't do under the oil lamps because the light range was very small. (First Certificate in English; B2; Chinese)
guitar/violin strings
We had been playing six numbers already when it happened: my bottom E string broke in the middle of my solo. (First Certificate in English; B2; French)
a string of questions
As a writer, she's enjoyed a string of successes.
Cities have grown, bringing with this growth a string of problems which were not thought of years ago. (Certificate of Proficiency in English; C2; Haitian Creole)
I may be able to pull a few strings, if you need the money urgently.
This isn't secret: I thought some of these ideas might be of interest and perhaps an article about them [i]n your newspaper would pull the necessary strings at the City Hall to produce some very much needed changes. (Certificate of Proficiency in English; C2; Catalan)
I'll drive you home - no strings attached.
It is not that often that one comes across true "no strings attached" generosity. (Certificate of Proficiency in English; C2; Danish)