certainly, for sure probably 10 realizations
ACCEPTED Realization 1
type Polysemy
language Afrikaans
lexeme seker
meaning 1 sure, definite, certain
direction
meaning 2 probably

Dis seker wat gebeur het.


That's probably what happened.

reference English Wiktionary
comment

From Dutch zeker, from Middle Dutch seker

ACCEPTED Realization 2
type Polysemy
language Belarusan
lexeme напэўна
meaning 1 certainly, for sure

Крайко, што называецца, дзейнiчаў заўсёды напэўна, ён не любiў працаваць прыблiзна, абы-як.

direction
meaning 2 probably

Гукун брыўся паволi, не спешаючыся. Напэўна, тут, у лясным гушчары, ён адчуваў сябе спакойна

reference <personally collected data>
comment

ТСБМ 3, 294

ACCEPTED Realization 3
type Polysemy
language Bikol
lexeme seguro
meaning 1 (rare) sure
direction
meaning 2 maybe; probably; possibly; perhaps
reference <personally collected data>
comment
ACCEPTED Realization 4
type Polysemy
language Cebuano
lexeme seguro
meaning 1 sure
direction
meaning 2 maybe; probably; possibly; perhaps
reference <personally collected data>
comment
ACCEPTED Realization 5
type Semantic evolution
language French
lexeme sans doute
meaning 1 certainly, for sure
direction
meaning 2 possible
reference <personally collected data>
comment
ACCEPTED Realization 6
type Polysemy
language Komi
lexeme надейнӧ
meaning 1 certainly, for sure

сы йылысь тэ, надейнӧ, тӧдан


You certainly know about this

direction
meaning 2 probably

талун, надейнӧ, воас


He will probably arrive today

reference Beznosikova et al. 2000
comment
ACCEPTED Realization 7
type Polysemy
language Mongolian (Khalkha)
lexeme магад
meaning 1 certainly, for sure

би магад чадна


I can definitely do it

direction
meaning 2 probably

“Мандал” нэгдэл л төлөвлөгөөгөө давуулан биелүүлсэн байж магад


perhaps only the Mandal company has exceeded its plan

reference BAMRS 2001-2002
comment
ACCEPTED Realization 8
type Derivation
language Polish
lexeme 1 na pewno
lexeme 2 pewno
meaning 1 certainly, for sure
direction
meaning 2 probably

 Wczesny wieczór, a ja czuję senność. Obezwładniającą. Ziewam do bólu szczęk. Co się dzieje? Pewno skok ciśnienia.
NKJP: Anna Strońska: Dopóki milczy Ukraina, 1998

reference WSJP
comment
ACCEPTED Realization 9
type Internal cognates
language Russian
lexeme 1 наверняка
lexeme 2 наверное
meaning 1 certainly, for sure
direction
meaning 2 probably
reference <personally collected data>
comment
ACCEPTED Realization 10
type Borrowing
language Spanish
lexeme seguro
meaning 1 for sure
direction
meaning 2 (Philippines) probably; maybe; possibly; perhaps
reference <personally collected data>
comment

Lipski, John M. (June 1987), “Contemporary Philippine Spanish: Comments on Vestigial Usage”, in Philippine Journal of Linguistics‎, volume 18, number 1, page 45 http://php.scripts.psu.edu/faculty/j/m/jml34/philsp.pdf 

Tagalog siguro 'maybe; perhaps; probably; possibly' was borrowed from Philippine Spanish seguro 'probably; maybe', where Philippine Spanish instead uses segurado ('sure', literally 'assured') for the same sense