p. 53
The code word "cigarettes" appears on page 94 in the book "Number the Stars" by Lois Lowry. It is used to describe a situation where a character must pretend to smoke to avoid suspicion.
Kroner, the German soldier, is mentioned on page 61 in the book "Number the Stars" by Lois Lowry.
The word "rabbi" appears on page 51 of the book Number the Stars by Lois Lowry.
The word "imperious" appears on page 83 in the book "Number the Stars" by Lois Lowry.
The word "imperious" does not appear in "Number the Stars" by Lois Lowry.
The word "winced" appears in Chapter 12 of "Number the Stars" by Lois Lowry, on page 91 in the paperback edition.
The word "lanky" is found on page 17 of the book "Number the Stars" by Lois Lowry.
Page 43. This depends on the copy of your book, too.
No he smokes cigarettes...
In the book "Number the Stars" by Lois Lowry, the character named Seldom is not in the story. It is possible that you may be misremembering the name or confusing it with a different character.
The Stars Will Whisper
The quote "I was flying past the stars on silver wings" from Matilda is on page 42 of the book.
On page 27