WordRel.com

• not disposed to friendship or friendliness

  antonym	friendly
  derivation	unfriendliness
  also	coolhostileincompatibleinhospitableuncongenialunsociable
  attribute	friendliness
  similar	beetle-browedchillyscowlinguncordialunneighborlyunneighbourly

• not easy to understand or use

  antonym	friendly
  exemplifies	combining form

• very unfavorable to life or growth

  synonym	hostileuncongenial
  similar	inhospitable

• not friendly

  synonym	inimical
  derivation	unfriendliness
  similar	hostile