A clamp may be tightened.Logical formLearned from5 sentences. Guidelines may be tightened.Logical formLearned from5 sentences. A muscle may be tightened.Logical formLearned from5 sentences. (Border security) may be tightened.Logical formLearned from5 sentences. (Stomach muscles) may be tightened.Logical formLearned from5 sentences. (Purse strings) may be tightened.Logical formLearned from5 sentences. Persons may tighten (security measures).Logical formLearned from5 sentences. Hands may tighten on arms.Logical formLearned from5 sentences. Muscles of a jaw may tighten.Logical formLearned from5 sentences. A country may tighten a clampdown.Logical formLearned from5 sentences. Some dozen may tighten in weeks.Logical formLearned from5 sentences. A requirement may fit a pattern of tightenning (government control).Logical formLearned from5 sentences. A bill may tighten restrictions.Logical formLearned from5 sentences. A government may tighten requirements.Logical formLearned from5 sentences. A government may tighten access to credit.Logical formLearned from5 sentences.