[a] alamiah, bersahaja, natural, wajar

[a] 1) alami, alamiah, biasa, jamak, lazim, lumrah, reguler, wajar;
2) bersahaja, jujur, lugu, naif, spontan, tulus

[a] 1) alami, alamiah, biasa, bersahaja, galib, lazim, lumrah, natural, normal, prasaja, sederhana;
2) adil, proporsional, seimbang;