to boot -> επίσης, συν τοις άλλοις, και σαν να μην έφταναν όλα αυτά, κυρίως, μάλιστα, το κυριότερο, εκτός αυτού, επιπροσθέτως, επιπλέον, όχι μόνο... αλλά και..., εκτός τούτου, παραπανιστά, κι επιπλέον, επιπλέον

[spiros]

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to boot -> επίσης, συν τοις άλλοις, και σαν να μην έφταναν όλα αυτά

to boot
In addition; besides: Not only was the new cruise ship the biggest in the world, but the fastest to boot.
To boot - definition of to boot by The Free Dictionary

[dominotheory]

κυρίως, μάλιστα, το κυριότερο

to boot (not comparable)
(idiomatic) moreover, on top of that, besides, also.
My boyfriend is funny, and a pretty good cook, to boot.
https://en.wiktionary.org/wiki/to_boot?rdfrom=To_boot

Meaning
Moreover; in addition to.
Origin
This term has nothing to do with footwear. The 'boot' is thought to be a derivative of the earlier 'bat' meaning 'good or useful'. This is also the root of the word 'better'.
Forms of 'to boot' in Old English date from around 1000AD. Robert Manning of Brunne included a version of it in Langtoft's Chronicle, 1330:
"A hundreth knyghtes mo... and four hundreth to bote, squieres of gode aray."
http://www.phrases.org.uk/meanings/385450.html

The phrase can sometimes contain the idea of some positive outcome or advantage, not just something additional. In this, it’s reflecting its ancient origin in Old English bot, advantage, remedy. It’s of Germanic origin and is related to Dutch boete and German Busse (a penance or fine) as well as to the English words better and best.
http://www.worldwidewords.org/qa/qa-tob1.htm

[spiros]

Και παίζει και σύνταξη τύπου: όχι μόνο... αλλά και...

Στο παράδειγμά σου:

My boyfriend is funny, and a pretty good cook, to boot.
Ο φίλος μου όχι μόνο είναι αστείος, αλλά και πολύ καλός μάγειρας