to become loose;  to slacken (e.g. rope);  to become less tense;  to relax;  to slacken (e.g. coldness, supervision);  to become lax;  to become softer (e.g. ground, facial expression)
 to loosen;  to slacken;  to relax (attention, efforts, etc.);  to let down (one's guard);  to relax (a rule);  to ease (e.g. restrictions)
 loose;  lenient;  lax;  gentle (curve, slope, etc.);  slow;  weak;  soft
 loose;  slack;  gentle (slope, curve);  slow (speed);  lenient;  liberal
 relief;  mitigation;  alleviation;  relaxation (of restrictions, tensions, etc.);  easing;  softening
 relaxation (e.g. of muscles);  becoming flaccid
 slow;  sluggish;  dull;  lax;  sloppy;  lenient
 to relax one's mind;  to feel relaxed;  to become remiss;  to cease paying careful attention
 to relax one's efforts;  to let up;  to let one's guard down
 pace;  tempo;  slow and fast;  in case of emergency
 to become loose;  to slacken;  to soften
 deregulation;  removal (easing) of (official) restrictions;  relaxation of regulations
 very loose;  slowly;  leisurely
 to loosen the reins;  to let up on (someone)
 detente;  easing of tensions;  thaw
 varying the tempo or speed (of something) at will
 to weaken (of willpower, solidarity, etc.);  to lose one's edge;  to become less tense;  to become lax (of discipline, rules, etc.)
 to weaken (of willpower, solidarity, etc.);  to lose one's edge;  to become less tense;  to become lax (of discipline, rules, etc.)
 loose;  slack;  gentle;  easy;  lenient;  liberal
 buffer;  shock absorber;  damper unit
 remission;  improvement;  relief (of pain, symptoms, etc.)
 unhurriedly;  leisurely;  slowly;  relaxedly;  taking one's time
 brake van;  guard's van;  caboose
 ineffective move (in go or shogi);  wasted move
 palliative medicine;  palliative therapy;  palliative treatment;  palliative care
 to weaken (of willpower, solidarity, etc.);  to lose one's edge;  to become less tense;  to become lax (of discipline, rules, etc.)
 (when) danger threatens;  should an emergency occur
 atonic hemorrhage;  atonic haemorrhage
 very loose;  slowly;  leisurely
 alleviation of congestion (esp. traffic)
 partial relaxation;  partial easing
 composed and unhurried;  easygoing and leisurely;  in indolence
 controlled-release fertilizer;  slow-acting fertilizer
 costumed mascot character (oft. devised for PR purposes by local governments, government departments, etc.)
 composed and unhurried;  easygoing and leisurely;  in indolence
 looking cool and collect;  with an air of perfect composure
 looking cool and collect;  with an air of perfect composure
 looking cool and collect;  with an air of perfect composure
 lack of (slackness in) military discipline;  demoralization
 tardigrade (any animal of phylum Tardigrada);  water bear
 buffer storage;  buffer;  buffer memory
 tempo indication;  tempo marking;  (a) tempo
 litotes (figure of speech);  meiosis