tightly/ 'taɪtlɪ /

1.adverb [grasp] [ cling] [ close] [ seal+] 
(firmly,tautly) 紧紧地

2.adverb
(closely) 紧密地

3.adverb [control] [ regulate+] 
(rigorously) 严格地

a tightly knit community
内部联系密切的社区