This is the 3718th most frequent Japanese word.
きり
"きり" can mean: 1. **Fog/mist** 2. **Cut/end/limit** 3. **Only/just** (used as a particle) Context determines the meaning.
In this sentence, 'きり' denotes that the action (buying the book) occurred once and has not been followed by the expected subsequent action (reading it).
その本を買ったきり読んでいません。
I haven't read the book since I bought it.
Here, 'きり' indicates that the action (opening the door) happened while the expected continuation (closing the door) did not occur.
ドアを開けたきりで、閉めるのを忘れた。
I left the door open after opening it and forgot to close it.
In this context, 'きり' refers to the occurrence of a single event (meeting him) and implies no further actions of the same kind happened after.