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till▼(until)
conjunction
[UK: tɪl] [US: ˈtɪl]

until▼(up to the time that)
conjunction
[UK: ʌn.ˈtɪl] [US: ʌn.ˈtɪl]

don't count your chickens before they're hatched▼(one should not depend upon a favorable outcome to one's plans until it is certain to occur)
phrase
[UK: dəʊnt kaʊnt jɔː(r) ˈtʃɪkɪnz bɪ.ˈfɔː(r) ˈðeə(r) hætʃt] [US: ˈdoʊnt ˈkaʊnt ˈjɔːr ˈtʃɪkənz bɪ.ˈfɔːr ˈðer ˈhætʃt]

there's many a slip twixt cup and lip▼(in any situation something can always go wrong)
phrase

seeing is believing▼(you need to see something to believe it)
phrase
[UK: ˈsiː.ɪŋ ɪz bɪ.ˈliːv.ɪŋ] [US: ˈsiː.ɪŋ ˈɪz bə.ˈliːv.ɪŋ]

not yet▼(not for the moment, though expected later)
adverb
[UK: nɒt jet] [US: ˈnɑːt jet]