凪ぐ[nagu] to become calm
夜凪[yonagi] evening calm
神凪[kannagi] medium
朝凪[asanagi] morning calm (over the ocean)
夕凪[yuunagi] evening calm

逆凪[sakanagi] backlash (after use of 'magic')
水凪鳥[mizunagidori] petrel (esp. petrels of family Procellariidae)
大水凪鳥[oomizunagidori] streaked shearwater (species of seabird, Calonectris leucomelas)
初凪[hatsunagi] first lull of the year

緩衝[kanshou] buffered
緩衝器[kanshouki] shock absorber
緩衝地帯[kanshouchitai] buffer zone
刺衝[shishou] stabbing
衝撃[shougeki] shock

衝撃波[shougekiha] shock wave
衝動[shoudou] impulse
衝動行為[shoudoukoui] shock action
衝動買い[shoudougai] impulsive buying
衝突[shoutotsu] collision