ἐνιαυτός

Luke 4:19 ἐνιαυτὸν [the] year

to proclaim the year of the Lord’s favor.”

Here: 'A year': a period of time set by God. Coming after 'release' (aphesis) in verse 18, it calls up Israel's sabbatical and Jubilee years, when debts were cancelled and land and people were set free. This is the content of the announcement, not a measure of how long Jesus' ministry would last.

John 11:49 ἐνιαυτοῦ year

But one of them, named Caiaphas, who was high priest that year, said to them, “You know nothing at all!

Here: "Of the year". The genitive case here marks the time something is true: he was high priest in that year. Most likely John means the decisive year of Jesus' death, not that the office lasted only one year.

John 11:51 ἐνιαυτοῦ year

Caiaphas did not say this on his own. Instead, as high priest that year, he was prophesying that Jesus would die for the nation,

Here: "Of that year." The genitive case marks time: high priest in that year. It does not say the office lasted one year.

John 18:13 ἐνιαυτοῦ year

They brought Him first to Annas, who was the father-in-law of Caiaphas, the high priest that year.

Acts 11:26 ἐνιαυτὸν a year

and when he found him, he brought him back to Antioch. So for a full year they met together with the church and taught large numbers of people. The disciples were first called Christians at Antioch.

Here: A year as a unit of time. The Greek case (accusative) expresses how long something lasted.

Acts 18:11 ἐνιαυτὸν a year

So Paul stayed for a year and a half, teaching the word of God among the Corinthians.

Galatians 4:10 ἐνιαυτούς. years.

You are observing special days and months and seasons and years!

Here: Observances on a yearly or multi-year cycle. Candidates include New Year, the sabbatical year and the Jubilee, but Paul leaves it general. It completes the sweep of the whole calendar, from day to year.

Hebrews 9:7 ἐνιαυτοῦ year

But only the high priest entered the second room, and then only once a year, and never without blood, which he offered for himself and for the sins the people had committed in ignorance.

Here: The annual cycle. The rite comes back every year, which Hebrews later reads as a sign that it never finished its work (10:1–3).

Hebrews 9:25 ἐνιαυτὸν year

Nor did He enter heaven to offer Himself again and again, as the high priest enters the Most Holy Place every year with blood that is not his own.

Here: Points to the Day of Atonement, the 10th of the seventh month (Lev 16:29, 34), which came round every year and so was never finished for good (compare 10:1–3).

Hebrews 10:1 ἐνιαυτὸν year

For the law is only a shadow of the good things to come, not the realities themselves. It can never, by the same sacrifices offered year after year, make perfect those who draw near to worship.

Here: Points to the annual Day of Atonement (Leviticus 16), when the high priest entered the inner sanctuary once a year (9:7, 25).

Hebrews 10:3 ἐνιαυτόν· year;

Instead, those sacrifices are an annual reminder of sins,

James 4:13 ἐνιαυτὸν a year

Come now, you who say, “Today or tomorrow we will go to this or that city, spend a year there, carry on business, and make a profit.”

Here: A whole year, which plausibly matches a trading cycle (sailing and caravan seasons). The merchants commit a year of a life that verse 14 calls a passing mist.

James 5:17 ἐνιαυτοὺς years

Elijah was a man just like us. He prayed earnestly that it would not rain, and it did not rain on the land for three and a half years.

Here: "Years". The case shows how long something lasted: "for years".

Revelation 9:15 ἐνιαυτὸν year

So the four angels who had been prepared for this hour and day and month and year were released to kill a third of mankind.

Here: The year that completes the date. Read together, the four terms work like a full calendar date stamp, not four lengths of time added together.