Je was op zoek naar: singular (Engels - Latijn)

singular
singularis

simple and singular
simplex et unum

you (singular) greet the girl.
puellam salutas

unice to a singular degree; especially;
unice

never cease to strive [imperative singular]
numquam tendere cessa

plural pigs or singular pig depending on what the suffix is.
suesque, sus or suis

god be with you (plural)/god be with you (singular)
dominus vobsicum/dominus tecum

to be seized, weakened, eroded (3rd person singular, passive indicative)
carpitur

speak unto the children of israel, and say unto them, when a man shall make a singular vow, the persons shall be for the lord by thy estimation.
loquere filiis israhel et dices ad eos homo qui votum fecerit et spoponderit deo animam suam sub aestimatione dabit pretiu

egregius, egregia, egregium singular; distinguished; exceptional; extraordinary; eminent; excellent;
egregia

singularis, singularis, singulare alone, unique; single, one by one; singular, remarkable, unusual;
singulare

unicus, unica, unicum only, sole, single, singular, unique; uncommon, unparalleled; one of a kind;
unica

costestes is not a classical latin word but might be medieval or church latin. cotestes could be a word (not classical) meaning something like co-witnesses. e spiritu (if they are the proper words) could mean out of/derived from the spirit (holy?). silentio is the dative or ablative singular of the neuter noun silentium meaning silence and could mean to/for/by/with/from/in/at/on (the) silence. but unless an accurate copy of the words can be obtained, i fear there is little chance of solving the riddle.
costestes e spiritu silentio