Keyword
prolong
Info
FrequencyTop 1200-1300
Type
Kyōiku (6th grade) 
?
KankenLevel 5
Heisig419
Readings
の
(51%)
えん
(47%)
Composed of
slash left
stop
long stride
Used in kanji (6 in total)
birth
drool
straw mat
???
Used in vocabulary (208 in total)
extension; elongation; (total) length; extension (e.g. of one's work); continuation; extension (of a line segment); extension (property of occupying space)
to survive; to live long
endlessly; continuously; (going) on and on; meandering; winding; sinuous
Examples (126 in total)
I could go on and on about it, but I won't.
All forms of life have an instinctive urge to survive.
The game was postponed until next week.