Strong's #5100: tis (pronounced tis)
 an enclitic indefinite pronoun; some or any person or object:--a (kind of), any (man, thing, thing at all), certain (thing), divers, he (every) man, one (X thing), ought, + partly, some (man, -body, - thing, -what), (+ that no-)thing, what(-soever), X wherewith, whom(-soever), whose(-soever).
Thayer's Greek Lexicon:
 ́ 
 
  tis 
 
 1) a certain, a certain one
 2) some, some time, a while
 
  Part of Speech: pronoun
Relation: an enclitic indefinite pronoun
 
Usage:
This word is used 460 times:
John 9:16: "Therefore said  some of the Pharisees, This man"
John 9:22: "already, that if  any man did confess that he was Christ, he should be"
John 9:31: "sinners: but if  any man be a worshiper of God, and doeth"
John 9:32: "Since the world began was it not heard that  any man opened the eyes of one that was born"
John 10:9: "by me if  any man enter in, he shall be saved, and shall go in"
John 10:28: "they shall never perish, neither  shall any man pluck"
John 11:1: "Now  a certain man was sick, named Lazarus, of Bethany, the"
John 11:9: "in the day? If  any man walk in the day,"
John 11:10: "But if  a man walk in the night, he stumbleth,"
John 11:37: "And  some of them said, Could not this man,"
John 11:46: "But  some of them went their ways to the Pharisees,"
John 11:49: " And one of them, named Caiaphas, being the high priest"
John 11:57: "a commandment, that, if  any man knew where he were, he should show"
John 12:20: "And there were  certain Greeks among them that came up to worship"
John 12:26: "If  any man serve me, let him follow me; and where"
John 12:26: "servant be: if  any man serve me, him"
John 12:47: "And if  any man hear my words, and believe"
John 13:20: "I say unto you, He that receiveth  whomsoever I send receiveth me;"
John 13:29: "For  some of them thought, because Judas had the bag,"
John 13:29: "or, that he should give  something to the poor."
John 14:14: "If ye shall ask  any thing in my name, I will do"
John 14:23: "said unto him, If  a man love me, he will keep my"
John 15:6: " If a man abide not in me, he is cast forth as"
John 15:13: "no man than this, that  a man lay down his life for"
John 16:30: "needest not that  any man should ask thee: by"
John 20:23: " Whose soever sins ye remit, they are remitted unto them; and whose soever"
John 20:23: "sins ye remit, they are remitted unto them;  and whose soever sins ye retain, they are retained."
Acts 2:45: "them to all men, as  every man had need."
Acts 3:2: "And  a certain man lame from his mother's womb"
Acts 3:5: "unto them, expecting to receive  something of them."
Acts 4:32: "neither said any  of them that aught of the things which he possessed was"
Acts 4:34: "Neither was  there any among them that lacked: for"
Acts 4:35: "distribution was made unto every man according as  he had need."
Acts 5:1: "But  a certain man named Ananias, with Sapphira his"
Acts 5:2: "being privy to it, and brought  a certain part, and laid it at the"
Acts 5:15: "of Peter passing by might overshadow  some of them."
Acts 5:25: "Then came  one and told them, saying, Behold, the"
Acts 5:34: "Then stood there up  one in the council,"
Acts 5:34: "a doctor of the law, had in reputation among all the people,"
Acts 5:34: "a doctor of the law, had in reputation among all the people,"
Acts 5:36: "boasting himself to be  somebody; to whom a number of men, about"
Acts 6:9: "Then there arose  certain of the synagogue, which is called the synagogue of the Libertines,"
Acts 7:24: "And seeing  one of them suffer wrong, he defended him, and avenged"
Acts 8:9: "giving out that himself was  some great one:"
Acts 8:9: "But  there was a certain man, called Simon, which beforetime in the"
Acts 8:9: "giving out that himself was  some great one:"
Acts 8:31: "How can I, except  some man should guide me? And"
Acts 8:36: "their way, they came unto  a certain water: and the eunuch"
Acts 9:2: "that if he found  any of this way, whether they were men"
Acts 9:10: "And there was  a certain disciple at Damascus named Ananias;"