(coming to a) mutual understanding;  understanding each other
 estrangement;  alienation;  neglecting to stay in contact
 (mutual) understanding;  communication;  passing without obstruction
 estrangement;  neglect;  alienation;  casting out;  ostracism;  giving the cold shoulder
 dispersal;  evacuation;  removal;  spreading out (troops);  deployment
 sparse;  distant (of a relationship);  estranged;  alienated
 empty (e.g. argument);  insubstantial;  hollow;  fruitless
 depopulation;  declining population
 mutual understanding;  agreement of wills
 underpopulated area;  lightly-populated area
 carelessness;  negligence;  oversight
 canal;  drainage;  hydrophobic
 dehumanization;  dehumanisation
 to lose population (e.g. of active forum members, etc.)
 underpopulated area;  lightly-populated area
 heaven's net has large meshes, but nothing escapes
 evacuation of school children (from major cities to more rural areas, esp. during late World War II)
 compressional wave;  longitudinal wave;  dilatational wave;  wave of condensation and rarefaction
 explanation (for purpose of convincing a judge)
 coarseness and fineness;  sparse or dense (growth)
 rough;  careless;  reckless;  slovenly
 vegetarian food;  vegetarian diet
 evacuating to the homes of one's relatives in the countryside in wartime
 (detailed) commentary;  notes;  comments
 sparsely connected neural network
 Loosely-Coupled MultiProcessor
 superficially cordial but actually uninterested
 rotator interval;  rotator cuff interval
 dead thread (e.g. in forum);  inactive thread
 depopulation bond;  funding measure for depopulated areas
 wanting to remain distant;  alienation;  estrangement;  unfriendliness