英和和英

an uncompleted line

an unidentified species

an unknown quantity

an unknown quantity

of undetermined species

an undefined term

a form filled out incompletely

an unlisted telephone number

a manuscript of uncertain origin

an unbroken chronological sequence

to undo a string―untie a string

without formality

an unbroken line

an unknown amount

irregular patterns

an unknown source

an anonymous piece of correspondence

in mathematics, a number series

a string for tying

to untie the strings―undo the strings

string the package

informal term

not literal

that is on a string

to announce something unofficially

a number in the Fibonacci sequence

an irregularly shaped spot

string words together

with no strings (attached)＝without strings

not metamorphic