案価[anka] low price
案じる[anjiru] to be anxious or concerned about
案の上[annojou] just as one thought
案下[anka] under the table
案外[angai] unexpectedly

案件[anken] matter in question
案山子[kakashi] scarecrow
案出[anshutsu] contrivance
案内[annai] information

一週[isshuu] one week
一週間[isshuukan] one week
今週[konshuu] this week
今週中に[konshuujuuni] before the week is out
さ来週[saraishuu] week after next

七週の祭[nanamawarinoiwai] the Feast of Weeks
七週の祭り[nanashuunomatsuri] the Feast of Weeks
週刊[shuukan] published weekly
週刊雑誌[shuukanzasshi] weekly magazine